Autodetect HAVE_PASSWD support

Fixes #122

.gitignore

@@ -7,6 +7,7 @@ src/filetypes.h
 src/bin2c
 src/gophernicus
 Makefile
+config.h
 
 README
 README.options

configure

@@ -64,6 +64,9 @@ done
 : ${CFLAGS:=-O2}
 : ${HOSTNAME:=autodetect}
 
+rm -f config.h
+touch config.h
+
 # Check for a compiler that actually works
 printf "checking for working compiler... "
 cat > conftest.c <<EOF
@@ -243,7 +246,8 @@ cat > conftest.c <<EOF
 int main() {}
 EOF
 if ${CC} -o conftest -lwrap conftest.c 2>/dev/null; then
-    LIBWRAP="-DHAVE_LIBWRAP -lwrap"
+    LIBWRAP="-lwrap"
+    echo "#define HAVE_LIBWARP " >> config.h
     printf "yes"
 else
     LIBWRAP=
@@ -251,6 +255,21 @@ else
 fi
 printf "\\n"
 
+# Checking for passwd support
+printf "checking for passwd support... "
+cat > conftest.c <<EOF
+#include <pwd.h>
+int main() {}
+EOF
+
+if ${CC} -o conftest conftest.c 2>/dev/null; then
+    echo "#define HAVE_PASSWD " >> config.h
+    printf "yes"
+else
+    printf "no"
+fi
+printf "\\n"
+
 # Check and use SHM if available
 printf "checking for ipcrm (SHM management)... "
 if ! IPCRM="$(command -v ipcrm)"; then

src/gophernicus.h

@@ -53,7 +53,7 @@
 /* Defaults should fit standard POSIX systems */
 #define HAVE_IPv4        /* IPv4 should work anywhere */
 #define HAVE_IPv6        /* Requires modern POSIX */
-#define HAVE_PASSWD        /* For systems with passwd-like userdb */
+/* #define HAVE_PASSWD        autodetected, For systems with passwd-like userdb */
 #define PASSWD_MIN_UID 100    /* Minimum allowed UID for ~userdirs */
 #define HAVE_LOCALES        /* setlocale() and friends */
 #define HAVE_SHMEM        /* Shared memory support */
@@ -63,6 +63,8 @@
 #undef  HAVE_SENDFILE        /* sendfile() in Linux & others */
 /* #undef  HAVE_LIBWRAP           autodetected, don't enable here */
 
+#include "config.h"
+
 /* Linux */
 #ifdef __linux
 #undef  PASSWD_MIN_UID