X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=configure.ac;h=d3f05aa19de3257758a82d1e5d2a76f497069da9;hb=379e19a21ba6937215bcd3eb9db8d5d54c286eae;hp=583843df66554a719d478788c4e5e0aa7e33f8b9;hpb=7d0a87a73a3962d361a2d3eb85ff346ffc7f4406;p=template.git

diff --git a/configure.ac b/configure.ac
index 583843d..d3f05aa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,7 @@
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT([foobar],[m4_esyscmd(./version-gen.sh)],[sh@tokkee.org])
+AC_INIT([foobar],[m4_esyscmd(./version-gen.sh)],
+		[Sebastian Harl <sh@tokkee.org>])
 AC_CONFIG_SRCDIR([src/foobar.c])
 AC_CONFIG_HEADERS([src/config.h])
 AC_PREFIX_DEFAULT([/opt/foobar])
@@ -11,7 +12,6 @@ AC_LANG(C)
 
 AC_SYS_LARGEFILE
 
-dnl Check for programs...
 AC_PROG_CC
 AC_PROG_CPP
 AC_PROG_INSTALL
@@ -30,6 +30,67 @@ test_cc_flags() {
 	return $ret
 }
 
+dnl Optionally stick to standard C99 and POSIX.1 2001 as close as possible.
+AC_ARG_ENABLE([standards],
+		AS_HELP_STRING([--enable-standards],
+				[Enable standards compliance mode]),
+		[enable_standards="$enableval"],
+		[enable_standards="no"])
+
+if test "x$enable_standards" = "xyes"; then
+	AC_DEFINE([_ISOC99_SOURCE], 1,
+			[Define to enforce ISO/IEC 9899:1999 (C99) compliance.])
+	AC_DEFINE([_POSIX_C_SOURCE], 200112L,
+			[Define to enforce IEEE 1003.1-2001 (POSIX:2001) compliance.])
+	AC_DEFINE([_XOPEN_SOURCE], 600,
+			[Define to enforce X/Open 6 (XSI) compliance.])
+	AC_DEFINE([_REENTRANT], 1,
+			[Define to enable reentrant interfaces.])
+	AC_DEFINE([_THREAD_SAFE], 1,
+			[Define to enable reentrant interfaces.])
+
+	for flag in -std=c99 -pedantic; do
+		AC_MSG_CHECKING([whether $CC accepts $flag])
+
+		if test_cc_flags $flag; then
+			CFLAGS="$CFLAGS $flag"
+			AC_MSG_RESULT([yes])
+		else
+			AC_MSG_RESULT([no])
+		fi
+	done
+fi
+
+dnl Hardening (see e.g. http://wiki.debian.org/Hardening for a motivation).
+AC_DEFINE([_FORTIFY_SOURCE], 2,
+		[Define to enable protection against static sized buffer overflows.])
+AC_ARG_ENABLE([hardening],
+		AS_HELP_STRING([--disable-hardening],
+				[Disable hardening options]),
+		[enable_hardening="$enableval"],
+		[enable_hardening="yes"])
+
+if test "x$enable_hardening" = "xyes"; then
+	hardening=0
+	hardening_tests=0
+	for flag in -Wformat -Wformat-security; do
+		hardening_tests=$(($hardening_tests + 1))
+		AC_MSG_CHECKING([whether $CC accepts $flag])
+
+		if test_cc_flags $flag; then
+			CFLAGS="$CFLAGS $flag"
+			hardening=$(($hardening + 1))
+			AC_MSG_RESULT([yes])
+		else
+			AC_MSG_RESULT([no])
+		fi
+	done
+	if test $hardening -ne $hardening_tests; then
+		AC_MSG_WARN(
+				[Some hardening options are not supported by your compiler!])
+	fi
+fi
+
 for flag in -Wall -Wextra -Werror; do
 	AC_MSG_CHECKING([whether $CC accepts $flag])
 
@@ -51,3 +112,19 @@ AC_CHECK_HEADERS(libgen.h)
 AC_CONFIG_FILES([Makefile src/Makefile])
 AC_OUTPUT
 
+cat <<EOF;
+
+$PACKAGE_NAME has been configured successfully.
+
+Run 'make' to compile the software and use 'make install' to
+install the package into $prefix.
+
+Configuration summary:
+
+  package version: $PACKAGE_VERSION
+  build date: $build_date
+
+Please report bugs to $PACKAGE_BUGREPORT.
+
+EOF
+