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Detect off_t size using AC_CHECK_SIZEOF because it works also when cross-compiling in autoconf-2.50 and higher.
git-svn-id: http://svn.irssi.org/repos/irssi/trunk@4392 dbcabf3a-b0e7-0310-adc4-f8d773084564
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29
configure.in
29
configure.in
@ -1,4 +1,5 @@
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AC_INIT(src)
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AC_PREREQ(2.50)
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# we don't want VERSION in our config.h
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if grep '^#undef VERSION' $srcdir/config.h.in >/dev/null; then
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@ -285,41 +286,23 @@ AC_DEFINE_UNQUOTED(_FILE_OFFSET_BITS, $preferred_off_t_bits)
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AC_CHECK_SIZEOF(int)
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AC_CHECK_SIZEOF(long)
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AC_CHECK_SIZEOF(long long)
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AC_CHECK_SIZEOF(off_t)
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dnl * older autoconfs don't include sys/types.h, so do it manually
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AC_MSG_CHECKING([size of off_t])
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AC_TRY_RUN([
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#include <stdio.h>
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#include <sys/types.h>
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int main() {
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FILE *f=fopen("conftestval", "w");
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if (!f) exit(1);
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fprintf(f, "%d\n", sizeof(off_t));
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return 0;
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}
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], [
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sizeof_off_t=`cat conftestval`
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rm -f conftestval
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], [
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AC_ERROR([Unsupported off_t size])
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])
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AC_MSG_RESULT($sizeof_off_t)
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if test $sizeof_off_t = 8; then
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if test $ac_cv_sizeof_off_t = 8; then
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offt_64bit=yes
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else
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offt_64bit=no
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fi
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if test x$sizeof_off_t = x$ac_cv_sizeof_long; then
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if test x$ac_cv_sizeof_off_t = x$ac_cv_sizeof_long; then
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# try to use unsigned long always first
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AC_DEFINE_UNQUOTED(PRIuUOFF_T, "lu")
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AC_DEFINE(UOFF_T_LONG)
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elif test x$sizeof_off_t = x$ac_cv_sizeof_int; then
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elif test x$ac_cv_sizeof_off_t = x$ac_cv_sizeof_int; then
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# next try int
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AC_DEFINE_UNQUOTED(PRIuUOFF_T, "u")
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AC_DEFINE(UOFF_T_INT)
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elif test x$sizeof_off_t = x$ac_cv_sizeof_long_long; then
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elif test x$ac_cv_sizeof_off_t = x$ac_cv_sizeof_long_long; then
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# and finally long long
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AC_DEFINE_UNQUOTED(PRIuUOFF_T, "llu")
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AC_DEFINE(UOFF_T_LONG_LONG)
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