815 lines
25 KiB
Plaintext
815 lines
25 KiB
Plaintext
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#!/bin/sh
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usage () {
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cat <<EOF
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Usage: $0 [OPTION]... [VAR=VALUE]... [TARGET]
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To assign environment variables (e.g., CC, CFLAGS...), specify them as
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VAR=VALUE. See below for descriptions of some of the useful variables.
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Defaults for the options are specified in brackets.
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Configuration:
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--srcdir=DIR source directory [detected]
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Installation directories:
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--prefix=PREFIX main installation prefix [/usr/local/musl]
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--exec-prefix=EPREFIX installation prefix for executable files [PREFIX]
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Fine tuning of the installation directories:
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--bindir=DIR user executables [EPREFIX/bin]
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--libdir=DIR library files for the linker [PREFIX/lib]
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--includedir=DIR include files for the C compiler [PREFIX/include]
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--syslibdir=DIR location for the dynamic linker [/lib]
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System types:
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--target=TARGET configure to run on target TARGET [detected]
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--host=HOST same as --target
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--build=BUILD build system type; used only to infer cross-compiling
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Optional features:
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--enable-optimize=... optimize listed components for speed over size [auto]
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--enable-debug build with debugging information [disabled]
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--disable-warnings build with recommended warnings flags [enabled]
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--enable-wrapper=... build given musl toolchain wrapper [auto]
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--disable-shared inhibit building shared library [enabled]
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--disable-static inhibit building static library [enabled]
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Optional packages:
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--with-malloc=... choose malloc implementation [mallocng]
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Some influential environment variables:
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CC C compiler command [detected]
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CFLAGS C compiler flags [-Os -pipe ...]
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CROSS_COMPILE prefix for cross compiler and tools [none]
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LIBCC compiler runtime library [detected]
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Use these variables to override the choices made by configure.
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EOF
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exit 0
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}
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# Helper functions
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quote () {
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tr '\n' ' ' <<EOF | grep '^[-[:alnum:]_=,./:]* $' >/dev/null 2>&1 && { echo "$1" ; return 0 ; }
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$1
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EOF
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printf %s\\n "$1" | sed -e "s/'/'\\\\''/g" -e "1s/^/'/" -e "\$s/\$/'/" -e "s#^'\([-[:alnum:]_,./:]*\)=\(.*\)\$#\1='\2#"
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}
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echo () { printf "%s\n" "$*" ; }
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fail () { echo "$*" ; exit 1 ; }
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fnmatch () { eval "case \"\$2\" in $1) return 0 ;; *) return 1 ;; esac" ; }
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cmdexists () { type "$1" >/dev/null 2>&1 ; }
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trycc () { test -z "$CC" && cmdexists "$1" && CC=$1 ; }
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stripdir () {
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while eval "fnmatch '*/' \"\${$1}\"" ; do eval "$1=\${$1%/}" ; done
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}
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trycppif () {
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printf "checking preprocessor condition %s... " "$1"
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echo "typedef int x;" > "$tmpc"
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echo "#if $1" >> "$tmpc"
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echo "#error yes" >> "$tmpc"
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echo "#endif" >> "$tmpc"
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if $CC $2 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
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printf "false\n"
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return 1
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else
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printf "true\n"
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return 0
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fi
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}
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tryflag () {
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printf "checking whether compiler accepts %s... " "$2"
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echo "typedef int x;" > "$tmpc"
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if $CC $CFLAGS_TRY $2 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
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printf "yes\n"
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eval "$1=\"\${$1} \$2\""
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eval "$1=\${$1# }"
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return 0
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else
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printf "no\n"
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return 1
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fi
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}
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tryldflag () {
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printf "checking whether linker accepts %s... " "$2"
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echo "typedef int x;" > "$tmpc"
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if $CC $LDFLAGS_TRY -nostdlib -shared "$2" -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
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printf "yes\n"
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eval "$1=\"\${$1} \$2\""
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eval "$1=\${$1# }"
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return 0
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else
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printf "no\n"
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return 1
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fi
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}
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# Beginning of actual script
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CFLAGS_C99FSE=
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CFLAGS_AUTO=
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CFLAGS_MEMOPS=
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CFLAGS_NOSSP=
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CFLAGS_TRY=
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LDFLAGS_AUTO=
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LDFLAGS_TRY=
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OPTIMIZE_GLOBS=
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srcdir=
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prefix=/usr/local/musl
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exec_prefix='$(prefix)'
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bindir='$(exec_prefix)/bin'
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libdir='$(prefix)/lib'
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includedir='$(prefix)/include'
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syslibdir='/lib'
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tools=
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tool_libs=
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build=
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target=
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optimize=auto
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debug=no
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warnings=yes
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shared=auto
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static=yes
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wrapper=auto
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gcc_wrapper=no
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clang_wrapper=no
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malloc_dir=mallocng
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for arg ; do
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case "$arg" in
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--help|-h) usage ;;
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--srcdir=*) srcdir=${arg#*=} ;;
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--prefix=*) prefix=${arg#*=} ;;
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--exec-prefix=*) exec_prefix=${arg#*=} ;;
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--bindir=*) bindir=${arg#*=} ;;
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--libdir=*) libdir=${arg#*=} ;;
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--includedir=*) includedir=${arg#*=} ;;
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--syslibdir=*) syslibdir=${arg#*=} ;;
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--enable-shared|--enable-shared=yes) shared=yes ;;
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--disable-shared|--enable-shared=no) shared=no ;;
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--enable-static|--enable-static=yes) static=yes ;;
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--disable-static|--enable-static=no) static=no ;;
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--enable-optimize) optimize=yes ;;
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--enable-optimize=*) optimize=${arg#*=} ;;
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--disable-optimize) optimize=no ;;
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--enable-debug|--enable-debug=yes) debug=yes ;;
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--disable-debug|--enable-debug=no) debug=no ;;
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--enable-warnings|--enable-warnings=yes) warnings=yes ;;
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--disable-warnings|--enable-warnings=no) warnings=no ;;
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--enable-wrapper|--enable-wrapper=yes) wrapper=detect ;;
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--enable-wrapper=all) wrapper=yes ; gcc_wrapper=yes ; clang_wrapper=yes ;;
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--enable-wrapper=gcc) wrapper=yes ; gcc_wrapper=yes ;;
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--enable-wrapper=clang) wrapper=yes ; clang_wrapper=yes ;;
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--disable-wrapper|--enable-wrapper=no) wrapper=no ;;
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--enable-gcc-wrapper|--enable-gcc-wrapper=yes) wrapper=yes ; gcc_wrapper=yes ;;
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--disable-gcc-wrapper|--enable-gcc-wrapper=no) wrapper=no ;;
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--with-malloc=*) malloc_dir=${arg#*=} ;;
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--enable-*|--disable-*|--with-*|--without-*|--*dir=*) ;;
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--host=*|--target=*) target=${arg#*=} ;;
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--build=*) build=${arg#*=} ;;
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-* ) echo "$0: unknown option $arg" ;;
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AR=*) AR=${arg#*=} ;;
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RANLIB=*) RANLIB=${arg#*=} ;;
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CC=*) CC=${arg#*=} ;;
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CFLAGS=*) CFLAGS=${arg#*=} ;;
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CPPFLAGS=*) CPPFLAGS=${arg#*=} ;;
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LDFLAGS=*) LDFLAGS=${arg#*=} ;;
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CROSS_COMPILE=*) CROSS_COMPILE=${arg#*=} ;;
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LIBCC=*) LIBCC=${arg#*=} ;;
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*=*) ;;
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*) build=$arg ; target=$arg ;;
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esac
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done
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for i in srcdir prefix exec_prefix bindir libdir includedir syslibdir ; do
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stripdir $i
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done
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#
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# Get the source dir for out-of-tree builds
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#
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if test -z "$srcdir" ; then
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srcdir="${0%/configure}"
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stripdir srcdir
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fi
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abs_builddir="$(pwd)" || fail "$0: cannot determine working directory"
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abs_srcdir="$(cd $srcdir && pwd)" || fail "$0: invalid source directory $srcdir"
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test "$abs_srcdir" = "$abs_builddir" && srcdir=.
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test "$srcdir" != "." && test -f Makefile && test ! -h Makefile && fail "$0: Makefile already exists in the working directory"
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#
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# Get a temp filename we can use
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#
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i=0
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set -C
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while : ; do i=$(($i+1))
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tmpc="./conf$$-$PPID-$i.c"
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2>|/dev/null > "$tmpc" && break
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test "$i" -gt 50 && fail "$0: cannot create temporary file $tmpc"
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done
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set +C
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trap 'rm "$tmpc"' EXIT INT QUIT TERM HUP
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#
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# Check that the requested malloc implementation exists
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#
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test -d "$srcdir/src/malloc/$malloc_dir" \
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|| fail "$0: error: chosen malloc implementation '$malloc_dir' does not exist"
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#
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# Check whether we are cross-compiling, and set a default
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# CROSS_COMPILE prefix if none was provided.
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#
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test "$target" && \
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test "$target" != "$build" && \
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test -z "$CROSS_COMPILE" && \
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CROSS_COMPILE="$target-"
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#
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# Find a C compiler to use
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#
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printf "checking for C compiler... "
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trycc ${CROSS_COMPILE}gcc
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trycc ${CROSS_COMPILE}c99
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trycc ${CROSS_COMPILE}cc
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printf "%s\n" "$CC"
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test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; }
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printf "checking whether C compiler works... "
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echo "typedef int x;" > "$tmpc"
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if output=$($CC $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" 2>&1) ; then
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printf "yes\n"
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else
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printf "no; compiler output follows:\n%s\n" "$output"
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exit 1
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fi
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#
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# Figure out options to force errors on unknown flags.
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#
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tryflag CFLAGS_TRY -Werror=unknown-warning-option
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tryflag CFLAGS_TRY -Werror=unused-command-line-argument
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tryflag CFLAGS_TRY -Werror=ignored-optimization-argument
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tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
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tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
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#
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# Need to know if the compiler is gcc or clang to decide which toolchain
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# wrappers to build.
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#
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printf "checking for C compiler family... "
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cc_ver="$(LC_ALL=C $CC -v 2>&1)"
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cc_family=unknown
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if fnmatch '*gcc\ version*' "$cc_ver" ; then
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cc_family=gcc
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elif fnmatch '*clang\ version*' "$cc_ver" ; then
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cc_family=clang
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fi
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echo "$cc_family"
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#
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# Figure out toolchain wrapper to build
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#
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if test "$wrapper" = auto || test "$wrapper" = detect ; then
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echo "#include <stdlib.h>" > "$tmpc"
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echo "#if ! __GLIBC__" >> "$tmpc"
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echo "#error no" >> "$tmpc"
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echo "#endif" >> "$tmpc"
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printf "checking for toolchain wrapper to build... "
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if test "$wrapper" = auto && ! $CC -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
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echo "none"
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elif test "$cc_family" = gcc ; then
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gcc_wrapper=yes
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echo "gcc"
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elif test "$cc_family" = clang ; then
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clang_wrapper=yes
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echo "clang"
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else
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echo "none"
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if test "$wrapper" = detect ; then
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fail "$0: could not find an appropriate toolchain wrapper"
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fi
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fi
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fi
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if test "$gcc_wrapper" = yes ; then
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tools="$tools obj/musl-gcc"
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tool_libs="$tool_libs lib/musl-gcc.specs"
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fi
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if test "$clang_wrapper" = yes ; then
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tools="$tools obj/musl-clang obj/ld.musl-clang"
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fi
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#
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# Find the target architecture
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#
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printf "checking target system type... "
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test -n "$target" || target=$($CC -dumpmachine 2>/dev/null) || target=unknown
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printf "%s\n" "$target"
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#
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# Convert to just ARCH
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#
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case "$target" in
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# Catch these early to simplify matching for 32-bit archs
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arm*) ARCH=arm ;;
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aarch64*) ARCH=aarch64 ;;
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i?86-nt32*) ARCH=nt32 ;;
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i?86*) ARCH=i386 ;;
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x86_64-x32*|x32*|x86_64*x32) ARCH=x32 ;;
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x86_64-nt64*) ARCH=nt64 ;;
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x86_64*) ARCH=x86_64 ;;
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m68k*) ARCH=m68k ;;
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mips64*|mipsisa64*) ARCH=mips64 ;;
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mips*) ARCH=mips ;;
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microblaze*) ARCH=microblaze ;;
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or1k*) ARCH=or1k ;;
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powerpc64*|ppc64*) ARCH=powerpc64 ;;
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powerpc*|ppc*) ARCH=powerpc ;;
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riscv64*) ARCH=riscv64 ;;
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sh[1-9bel-]*|sh|superh*) ARCH=sh ;;
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s390x*) ARCH=s390x ;;
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unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;;
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*) fail "$0: unknown or unsupported target \"$target\"" ;;
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esac
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#
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# Try to get a conforming C99 freestanding environment
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#
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tryflag CFLAGS_C99FSE -std=c99
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tryflag CFLAGS_C99FSE -nostdinc
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tryflag CFLAGS_C99FSE -ffreestanding \
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|| tryflag CFLAGS_C99FSE -fno-builtin
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tryflag CFLAGS_C99FSE -fexcess-precision=standard \
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|| { test "$ARCH" = i386 && tryflag CFLAGS_C99FSE -ffloat-store ; }
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tryflag CFLAGS_C99FSE -frounding-math
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#
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# We may use the may_alias attribute if __GNUC__ is defined, so
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|
# if the compiler defines __GNUC__ but does not provide it,
|
||
|
|
# it must be defined away as part of the CFLAGS.
|
||
|
|
#
|
||
|
|
printf "checking whether compiler needs attribute((may_alias)) suppression... "
|
||
|
|
cat > "$tmpc" <<EOF
|
||
|
|
typedef int
|
||
|
|
#ifdef __GNUC__
|
||
|
|
__attribute__((__may_alias__))
|
||
|
|
#endif
|
||
|
|
x;
|
||
|
|
EOF
|
||
|
|
if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS \
|
||
|
|
-c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
|
||
|
|
printf "no\n"
|
||
|
|
else
|
||
|
|
printf "yes\n"
|
||
|
|
CFLAGS_C99FSE="$CFLAGS_C99FSE -D__may_alias__="
|
||
|
|
fi
|
||
|
|
|
||
|
|
#
|
||
|
|
# The GNU toolchain defaults to assuming unmarked files need an
|
||
|
|
# executable stack, potentially exposing vulnerabilities in programs
|
||
|
|
# linked with such object files. Fix this.
|
||
|
|
#
|
||
|
|
tryflag CFLAGS_C99FSE -Wa,--noexecstack
|
||
|
|
|
||
|
|
#
|
||
|
|
# Check for options to disable stack protector, which needs to be
|
||
|
|
# disabled for a few early-bootstrap translation units. If not found,
|
||
|
|
# this is not an error; we assume the toolchain does not do ssp.
|
||
|
|
#
|
||
|
|
tryflag CFLAGS_NOSSP -fno-stack-protector
|
||
|
|
|
||
|
|
#
|
||
|
|
# Check for options that may be needed to prevent the compiler from
|
||
|
|
# generating self-referential versions of memcpy,, memmove, memcmp,
|
||
|
|
# and memset. Really, we should add a check to determine if this
|
||
|
|
# option is sufficient, and if not, add a macro to cripple these
|
||
|
|
# functions with volatile...
|
||
|
|
#
|
||
|
|
tryflag CFLAGS_MEMOPS -fno-tree-loop-distribute-patterns
|
||
|
|
|
||
|
|
#
|
||
|
|
# Enable debugging if requessted.
|
||
|
|
#
|
||
|
|
test "$debug" = yes && CFLAGS_AUTO=-g
|
||
|
|
|
||
|
|
#
|
||
|
|
# Preprocess asm files to add extra debugging information if debug is
|
||
|
|
# enabled, our assembler supports the needed directives, and the
|
||
|
|
# preprocessing script has been written for our architecture.
|
||
|
|
#
|
||
|
|
printf "checking whether we should preprocess assembly to add debugging information... "
|
||
|
|
if fnmatch '-g*|*\ -g*' "$CFLAGS_AUTO $CFLAGS" &&
|
||
|
|
test -f "tools/add-cfi.$ARCH.awk" &&
|
||
|
|
printf ".file 1 \"srcfile.s\"\n.line 1\n.cfi_startproc\n.cfi_endproc" | $CC -g -x assembler -c -o /dev/null 2>/dev/null -
|
||
|
|
then
|
||
|
|
ADD_CFI=yes
|
||
|
|
else
|
||
|
|
ADD_CFI=no
|
||
|
|
fi
|
||
|
|
printf "%s\n" "$ADD_CFI"
|
||
|
|
|
||
|
|
#
|
||
|
|
# Possibly add a -O option to CFLAGS and select modules to optimize with
|
||
|
|
# -O3 based on the status of --enable-optimize and provided CFLAGS.
|
||
|
|
#
|
||
|
|
printf "checking for optimization settings... "
|
||
|
|
case "x$optimize" in
|
||
|
|
xauto)
|
||
|
|
if fnmatch '-O*|*\ -O*' "$CFLAGS_AUTO $CFLAGS" ; then
|
||
|
|
printf "using provided CFLAGS\n" ;optimize=no
|
||
|
|
else
|
||
|
|
printf "using defaults\n" ; optimize=yes
|
||
|
|
fi
|
||
|
|
;;
|
||
|
|
xsize|xnone) printf "minimize size\n" ; optimize=size ;;
|
||
|
|
xno|x) printf "disabled\n" ; optimize=no ;;
|
||
|
|
*) printf "custom\n" ;;
|
||
|
|
esac
|
||
|
|
|
||
|
|
test "$optimize" = no || tryflag CFLAGS_AUTO -Os || tryflag CFLAGS_AUTO -O2
|
||
|
|
test "$optimize" = yes && optimize="internal,malloc,string"
|
||
|
|
|
||
|
|
if fnmatch 'no|size' "$optimize" ; then :
|
||
|
|
else
|
||
|
|
printf "components to be optimized for speed:"
|
||
|
|
while test "$optimize" ; do
|
||
|
|
case "$optimize" in
|
||
|
|
*,*) this=${optimize%%,*} optimize=${optimize#*,} ;;
|
||
|
|
*) this=$optimize optimize=
|
||
|
|
esac
|
||
|
|
printf " $this"
|
||
|
|
case "$this" in
|
||
|
|
*/*.c) ;;
|
||
|
|
*/*) this=$this*.c ;;
|
||
|
|
*) this=$this/*.c ;;
|
||
|
|
esac
|
||
|
|
OPTIMIZE_GLOBS="$OPTIMIZE_GLOBS $this"
|
||
|
|
done
|
||
|
|
OPTIMIZE_GLOBS=${OPTIMIZE_GLOBS# }
|
||
|
|
printf "\n"
|
||
|
|
fi
|
||
|
|
|
||
|
|
# Always try -pipe
|
||
|
|
tryflag CFLAGS_AUTO -pipe
|
||
|
|
|
||
|
|
#
|
||
|
|
# If debugging is disabled, omit frame pointer. Modern GCC does this
|
||
|
|
# anyway on most archs even when debugging is enabled since the frame
|
||
|
|
# pointer is no longer needed for debugging.
|
||
|
|
#
|
||
|
|
if fnmatch '-g*|*\ -g*' "$CFLAGS_AUTO $CFLAGS" ; then :
|
||
|
|
else
|
||
|
|
tryflag CFLAGS_AUTO -fomit-frame-pointer
|
||
|
|
fi
|
||
|
|
|
||
|
|
#
|
||
|
|
# Modern GCC wants to put DWARF tables (used for debugging and
|
||
|
|
# unwinding) in the loaded part of the program where they are
|
||
|
|
# unstrippable. These options force them back to debug sections (and
|
||
|
|
# cause them not to get generated at all if debugging is off).
|
||
|
|
#
|
||
|
|
tryflag CFLAGS_AUTO -fno-unwind-tables
|
||
|
|
tryflag CFLAGS_AUTO -fno-asynchronous-unwind-tables
|
||
|
|
|
||
|
|
#
|
||
|
|
# Attempt to put each function and each data object in its own
|
||
|
|
# section. This both allows additional size optimizations at link
|
||
|
|
# time and works around a dangerous class of compiler/assembler bugs
|
||
|
|
# whereby relative address expressions are constant-folded by the
|
||
|
|
# assembler even when one or more of the symbols involved is
|
||
|
|
# replaceable. See gas pr 18561 and gcc pr 66609, 68178, etc.
|
||
|
|
#
|
||
|
|
tryflag CFLAGS_AUTO -ffunction-sections
|
||
|
|
tryflag CFLAGS_AUTO -fdata-sections
|
||
|
|
|
||
|
|
#
|
||
|
|
# On x86, make sure we don't have incompatible instruction set
|
||
|
|
# extensions enabled by default. This is bad for making static binaries.
|
||
|
|
# We cheat and use i486 rather than i386 because i386 really does not
|
||
|
|
# work anyway (issues with atomic ops).
|
||
|
|
# Some build environments pass -march and -mtune options via CC, so
|
||
|
|
# check both CC and CFLAGS.
|
||
|
|
#
|
||
|
|
if test "$ARCH" = "i386" ; then
|
||
|
|
fnmatch '-march=*|*\ -march=*' "$CC $CFLAGS" || tryldflag CFLAGS_AUTO -march=i486
|
||
|
|
fnmatch '-mtune=*|*\ -mtune=*' "$CC $CFLAGS" || tryldflag CFLAGS_AUTO -mtune=generic
|
||
|
|
fi
|
||
|
|
|
||
|
|
#
|
||
|
|
# GCC defines -w as overriding any -W options, regardless of order, but
|
||
|
|
# clang has a bunch of annoying warnings enabled by default and needs -w
|
||
|
|
# to start from a clean slate. So use -w if building with clang. Also
|
||
|
|
# turn off a common on-by-default cast warning regardless of compiler.
|
||
|
|
#
|
||
|
|
test "$cc_family" = clang && tryflag CFLAGS_AUTO -w
|
||
|
|
|
||
|
|
tryflag CFLAGS_AUTO -Wno-pointer-to-int-cast
|
||
|
|
|
||
|
|
#
|
||
|
|
# Even with -std=c99, gcc accepts some constructs which are constraint
|
||
|
|
# violations. We want to treat these as errors regardless of whether
|
||
|
|
# other purely stylistic warnings are enabled -- especially implicit
|
||
|
|
# function declarations, which are a dangerous programming error.
|
||
|
|
#
|
||
|
|
tryflag CFLAGS_AUTO -Werror=implicit-function-declaration
|
||
|
|
tryflag CFLAGS_AUTO -Werror=implicit-int
|
||
|
|
tryflag CFLAGS_AUTO -Werror=pointer-sign
|
||
|
|
tryflag CFLAGS_AUTO -Werror=pointer-arith
|
||
|
|
tryflag CFLAGS_AUTO -Werror=int-conversion
|
||
|
|
tryflag CFLAGS_AUTO -Werror=incompatible-pointer-types
|
||
|
|
tryflag CFLAGS_AUTO -Werror=discarded-qualifiers
|
||
|
|
tryflag CFLAGS_AUTO -Werror=discarded-array-qualifiers
|
||
|
|
|
||
|
|
#
|
||
|
|
# GCC ignores unused arguements by default, but Clang needs this extra
|
||
|
|
# parameter to stop printing warnings about LDFLAGS passed during
|
||
|
|
# compiling stage and CFLAGS passed during linking stage.
|
||
|
|
#
|
||
|
|
test "$cc_family" = clang && tryflag CFLAGS_AUTO -Qunused-arguments
|
||
|
|
|
||
|
|
if test "x$warnings" = xyes ; then
|
||
|
|
tryflag CFLAGS_AUTO -Waddress
|
||
|
|
tryflag CFLAGS_AUTO -Warray-bounds
|
||
|
|
tryflag CFLAGS_AUTO -Wchar-subscripts
|
||
|
|
tryflag CFLAGS_AUTO -Wduplicate-decl-specifier
|
||
|
|
tryflag CFLAGS_AUTO -Winit-self
|
||
|
|
tryflag CFLAGS_AUTO -Wreturn-type
|
||
|
|
tryflag CFLAGS_AUTO -Wsequence-point
|
||
|
|
tryflag CFLAGS_AUTO -Wstrict-aliasing
|
||
|
|
tryflag CFLAGS_AUTO -Wunused-function
|
||
|
|
tryflag CFLAGS_AUTO -Wunused-label
|
||
|
|
tryflag CFLAGS_AUTO -Wunused-variable
|
||
|
|
fi
|
||
|
|
|
||
|
|
# Determine if the compiler produces position-independent code (PIC)
|
||
|
|
# by default. If so, we don't need to compile separate object files
|
||
|
|
# for libc.a and libc.so.
|
||
|
|
if trycppif __PIC__ "$CFLAGS_C99FSE $CPPFLAGS $CFLAGS" ; then
|
||
|
|
pic_default=yes
|
||
|
|
else
|
||
|
|
pic_default=no
|
||
|
|
fi
|
||
|
|
|
||
|
|
# Reduce space lost to padding for alignment purposes by sorting data
|
||
|
|
# objects according to their alignment reqirements. This approximates
|
||
|
|
# optimal packing.
|
||
|
|
tryldflag LDFLAGS_AUTO -Wl,--sort-section,alignment
|
||
|
|
tryldflag LDFLAGS_AUTO -Wl,--sort-common
|
||
|
|
|
||
|
|
# When linking shared library, drop dummy weak definitions that were
|
||
|
|
# replaced by strong definitions from other translation units.
|
||
|
|
tryldflag LDFLAGS_AUTO -Wl,--gc-sections
|
||
|
|
|
||
|
|
# Some patched GCC builds have these defaults messed up...
|
||
|
|
tryldflag LDFLAGS_AUTO -Wl,--hash-style=both
|
||
|
|
|
||
|
|
# Prevent linking if there are undefined symbols; if any exist,
|
||
|
|
# libc.so will crash at runtime during relocation processing.
|
||
|
|
# The common way this can happen is failure to link the compiler
|
||
|
|
# runtime library; implementation error is also a possibility.
|
||
|
|
tryldflag LDFLAGS_AUTO -Wl,--no-undefined
|
||
|
|
|
||
|
|
# Avoid exporting symbols from compiler runtime libraries. They
|
||
|
|
# should be hidden anyway, but some toolchains including old gcc
|
||
|
|
# versions built without shared library support and pcc are broken.
|
||
|
|
tryldflag LDFLAGS_AUTO -Wl,--exclude-libs=ALL
|
||
|
|
|
||
|
|
# Public data symbols must be interposable to allow for copy
|
||
|
|
# relocations, but otherwise we want to bind symbols at libc link
|
||
|
|
# time to eliminate startup relocations and PLT overhead. Use
|
||
|
|
# --dynamic-list rather than -Bsymbolic-functions for greater
|
||
|
|
# control over what symbols are left unbound.
|
||
|
|
tryldflag LDFLAGS_AUTO -Wl,--dynamic-list="$srcdir/dynamic.list"
|
||
|
|
|
||
|
|
# Find compiler runtime library
|
||
|
|
test -z "$LIBCC" && tryldflag LIBCC -lgcc && tryldflag LIBCC -lgcc_eh
|
||
|
|
test -z "$LIBCC" && tryldflag LIBCC -lcompiler_rt
|
||
|
|
test -z "$LIBCC" && try_libcc=`$CC -print-libgcc-file-name 2>/dev/null` \
|
||
|
|
&& tryldflag LIBCC "$try_libcc"
|
||
|
|
test -z "$LIBCC" && try_libcc=`$CC -print-file-name=libpcc.a 2>/dev/null` \
|
||
|
|
&& tryldflag LIBCC "$try_libcc"
|
||
|
|
printf "using compiler runtime libraries: %s\n" "$LIBCC"
|
||
|
|
|
||
|
|
# Figure out arch variants for archs with variants
|
||
|
|
SUBARCH=
|
||
|
|
t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS"
|
||
|
|
|
||
|
|
if test "$ARCH" = "i386" ; then
|
||
|
|
printf "checking whether compiler can use ebx in PIC asm constraints... "
|
||
|
|
cat > "$tmpc" <<EOF
|
||
|
|
int foo(int x) { __asm__ ( "" : "+b"(x) ); return x; }
|
||
|
|
EOF
|
||
|
|
if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -fPIC \
|
||
|
|
-c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
|
||
|
|
printf "yes\n"
|
||
|
|
else
|
||
|
|
printf "no\n"
|
||
|
|
CFLAGS_AUTO="$CFLAGS_AUTO -DBROKEN_EBX_ASM"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test "$ARCH" = "x86_64" ; then
|
||
|
|
trycppif __ILP32__ "$t" && ARCH=x32
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test "$ARCH" = "arm" ; then
|
||
|
|
if trycppif __thumb2__ "$t" ; then
|
||
|
|
tryflag CFLAGS_AUTO -mimplicit-it=always
|
||
|
|
tryflag CFLAGS_AUTO -Wa,-mimplicit-it=always
|
||
|
|
tryflag CFLAGS_AUTO -Wa,-mthumb
|
||
|
|
fi
|
||
|
|
trycppif __ARMEB__ "$t" && SUBARCH=${SUBARCH}eb
|
||
|
|
trycppif __ARM_PCS_VFP "$t" && SUBARCH=${SUBARCH}hf
|
||
|
|
# Versions of clang up until at least 3.8 have the wrong constraint codes
|
||
|
|
# for floating point operands to inline asm. Detect this so the affected
|
||
|
|
# source files can just disable the asm.
|
||
|
|
if test "$cc_family" = clang ; then
|
||
|
|
printf "checking whether clang's vfp asm constraints work... "
|
||
|
|
echo 'float f(float x) { __asm__("":"+t"(x)); return x; }' > "$tmpc"
|
||
|
|
if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
|
||
|
|
printf "yes\n"
|
||
|
|
else
|
||
|
|
printf "no\n"
|
||
|
|
CFLAGS_AUTO="$CFLAGS_AUTO -DBROKEN_VFP_ASM"
|
||
|
|
CFLAGS_AUTO="${CFLAGS_AUTO# }"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test "$ARCH" = "aarch64" ; then
|
||
|
|
trycppif __AARCH64EB__ "$t" && SUBARCH=${SUBARCH}_be
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test "$ARCH" = "m68k" ; then
|
||
|
|
if trycppif "__HAVE_68881__" ; then : ;
|
||
|
|
elif trycppif "__mcffpu__" ; then SUBARCH="-fp64"
|
||
|
|
else SUBARCH="-sf"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test "$ARCH" = "mips" ; then
|
||
|
|
trycppif "__mips_isa_rev >= 6" "$t" && SUBARCH=${SUBARCH}r6
|
||
|
|
trycppif "_MIPSEL || __MIPSEL || __MIPSEL__" "$t" && SUBARCH=${SUBARCH}el
|
||
|
|
trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test "$ARCH" = "mips64" ; then
|
||
|
|
trycppif "_MIPS_SIM != _ABI64" "$t" && ARCH=mipsn32
|
||
|
|
trycppif "__mips_isa_rev >= 6" "$t" && SUBARCH=${SUBARCH}r6
|
||
|
|
trycppif "_MIPSEL || __MIPSEL || __MIPSEL__" "$t" && SUBARCH=${SUBARCH}el
|
||
|
|
trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test "$ARCH" = "powerpc" ; then
|
||
|
|
trycppif "__NO_FPRS__ && !_SOFT_FLOAT" "$t" && fail \
|
||
|
|
"$0: error: compiler's floating point configuration is unsupported"
|
||
|
|
trycppif _SOFT_FLOAT "$t" && SUBARCH=${SUBARCH}-sf
|
||
|
|
printf "checking whether compiler can use 'd' constraint in asm... "
|
||
|
|
echo 'double f(double x) { __asm__ ("fabs %0, %1" : "=d"(x) : "d"(x)); return x; }' > "$tmpc"
|
||
|
|
if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
|
||
|
|
printf "yes\n"
|
||
|
|
else
|
||
|
|
printf "no\n"
|
||
|
|
CFLAGS_AUTO="$CFLAGS_AUTO -DBROKEN_PPC_D_ASM"
|
||
|
|
CFLAGS_AUTO="${CFLAGS_AUTO# }"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \
|
||
|
|
&& SUBARCH=${SUBARCH}el
|
||
|
|
|
||
|
|
if test "$ARCH" = "powerpc64" ; then
|
||
|
|
trycppif "_CALL_ELF == 2" "$t" || fail "$0: error: unsupported powerpc64 ABI"
|
||
|
|
trycppif __LITTLE_ENDIAN__ "$t" && SUBARCH=${SUBARCH}le
|
||
|
|
trycppif _SOFT_FLOAT "$t" && fail "$0: error: soft-float not supported on powerpc64"
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test "$ARCH" = "riscv64" ; then
|
||
|
|
trycppif __riscv_float_abi_soft "$t" && SUBARCH=${SUBARCH}-sf
|
||
|
|
trycppif __riscv_float_abi_single "$t" && SUBARCH=${SUBARCH}-sp
|
||
|
|
fi
|
||
|
|
|
||
|
|
if test "$ARCH" = "sh" ; then
|
||
|
|
tryflag CFLAGS_AUTO -Wa,--isa=any
|
||
|
|
trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb
|
||
|
|
if trycppif "__SH_FPU_ANY__ || __SH4__" "$t" ; then
|
||
|
|
# Some sh configurations are broken and replace double with float
|
||
|
|
# rather than using softfloat when the fpu is present but only
|
||
|
|
# supports single precision. Reject them.
|
||
|
|
printf "checking whether compiler's double type is IEEE double... "
|
||
|
|
echo 'typedef char dblcheck[(int)sizeof(double)-5];' > "$tmpc"
|
||
|
|
if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
|
||
|
|
printf "yes\n"
|
||
|
|
else
|
||
|
|
printf "no\n"
|
||
|
|
fail "$0: error: compiler's floating point configuration is unsupported"
|
||
|
|
fi
|
||
|
|
else
|
||
|
|
SUBARCH=${SUBARCH}-nofpu
|
||
|
|
fi
|
||
|
|
if trycppif __SH_FDPIC__ "$t" ; then
|
||
|
|
SUBARCH=${SUBARCH}-fdpic
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
test "$SUBARCH" \
|
||
|
|
&& printf "configured for %s variant: %s\n" "$ARCH" "$ARCH$SUBARCH"
|
||
|
|
|
||
|
|
case "$ARCH$SUBARCH" in
|
||
|
|
arm) ASMSUBARCH=el ;;
|
||
|
|
*) ASMSUBARCH=$SUBARCH ;;
|
||
|
|
esac
|
||
|
|
|
||
|
|
#
|
||
|
|
# Some archs (powerpc) have different possible long double formats
|
||
|
|
# that the compiler can be configured for. The logic for whether this
|
||
|
|
# is supported is in bits/float.h; in general, it is not. We need to
|
||
|
|
# check for mismatches here or code in printf, strotd, and scanf will
|
||
|
|
# be dangerously incorrect because it depends on (1) the macros being
|
||
|
|
# correct, and (2) IEEE semantics.
|
||
|
|
#
|
||
|
|
printf "checking whether compiler's long double definition matches float.h... "
|
||
|
|
echo '#include <float.h>' > "$tmpc"
|
||
|
|
echo '#define C(m,s) (m==LDBL_MANT_DIG && s==sizeof(long double))' >> "$tmpc"
|
||
|
|
echo 'typedef char ldcheck[(C(53,8)||C(64,12)||C(64,16)||C(113,16))*2-1];' >> "$tmpc"
|
||
|
|
if $CC $CFLAGS_C99FSE \
|
||
|
|
-I$srcdir/arch/$ARCH -I$srcdir/arch/generic -I$srcdir/include \
|
||
|
|
$CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
|
||
|
|
printf "yes\n"
|
||
|
|
else
|
||
|
|
printf "no\n"
|
||
|
|
fail "$0: error: unsupported long double type"
|
||
|
|
fi
|
||
|
|
|
||
|
|
#
|
||
|
|
# Some build systems globally pass in broken CFLAGS like -ffast-math
|
||
|
|
# for all packages. On recent GCC we can detect this and error out
|
||
|
|
# early rather than producing a seriously-broken math library.
|
||
|
|
#
|
||
|
|
if trycppif "__FAST_MATH__" \
|
||
|
|
"$CFLAGS_C99FSE $CPPFLAGS $CFLAGS" ; then
|
||
|
|
fail "$0: error: compiler has broken floating point; check CFLAGS"
|
||
|
|
fi
|
||
|
|
|
||
|
|
printf "creating config.mak... "
|
||
|
|
|
||
|
|
cmdline=$(quote "$0")
|
||
|
|
for i ; do cmdline="$cmdline $(quote "$i")" ; done
|
||
|
|
|
||
|
|
exec 3>&1 1>config.mak
|
||
|
|
|
||
|
|
|
||
|
|
cat << EOF
|
||
|
|
# This version of config.mak was generated by:
|
||
|
|
# $cmdline
|
||
|
|
# Any changes made here will be lost if configure is re-run
|
||
|
|
AR = ${AR:-\$(CROSS_COMPILE)ar}
|
||
|
|
RANLIB = ${RANLIB:-\$(CROSS_COMPILE)ranlib}
|
||
|
|
ARCH = $ARCH
|
||
|
|
SUBARCH = $SUBARCH
|
||
|
|
ASMSUBARCH = $ASMSUBARCH
|
||
|
|
srcdir = $srcdir
|
||
|
|
prefix = $prefix
|
||
|
|
exec_prefix = $exec_prefix
|
||
|
|
bindir = $bindir
|
||
|
|
libdir = $libdir
|
||
|
|
includedir = $includedir
|
||
|
|
syslibdir = $syslibdir
|
||
|
|
CC = $CC
|
||
|
|
CFLAGS = $CFLAGS
|
||
|
|
CFLAGS_AUTO = $CFLAGS_AUTO
|
||
|
|
CFLAGS_C99FSE = $CFLAGS_C99FSE
|
||
|
|
CFLAGS_MEMOPS = $CFLAGS_MEMOPS
|
||
|
|
CFLAGS_NOSSP = $CFLAGS_NOSSP
|
||
|
|
CPPFLAGS = $CPPFLAGS
|
||
|
|
LDFLAGS = $LDFLAGS
|
||
|
|
LDFLAGS_AUTO = $LDFLAGS_AUTO
|
||
|
|
CROSS_COMPILE = $CROSS_COMPILE
|
||
|
|
LIBCC = $LIBCC
|
||
|
|
OPTIMIZE_GLOBS = $OPTIMIZE_GLOBS
|
||
|
|
ALL_TOOLS = $tools
|
||
|
|
TOOL_LIBS = $tool_libs
|
||
|
|
ADD_CFI = $ADD_CFI
|
||
|
|
MALLOC_DIR = $malloc_dir
|
||
|
|
EOF
|
||
|
|
test "x$static" = xno && echo "STATIC_LIBS ="
|
||
|
|
test "x$shared" = xno && echo "SHARED_LIBS ="
|
||
|
|
test "x$cc_family" = xgcc && echo 'WRAPCC_GCC = $(CC)'
|
||
|
|
test "x$cc_family" = xclang && echo 'WRAPCC_CLANG = $(CC)'
|
||
|
|
test "x$pic_default" = xyes && echo 'AOBJS = $(LOBJS)'
|
||
|
|
exec 1>&3 3>&-
|
||
|
|
|
||
|
|
test "$srcdir" = "." || ln -sf $srcdir/Makefile .
|
||
|
|
|
||
|
|
printf "done\n"
|