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| author | Paul P Komkoff Jr <i@stingr.net> | 2008-08-13 16:17:04 +0100 |
|---|---|---|
| committer | Paul Jakma <paul@quagga.net> | 2008-08-22 19:52:12 +0100 |
| commit | 46bc0e432e756fcb8fc4f703b47cd25b9fc7139c (patch) | |
| tree | 60100ca1e11c3c3600441d366b236f4a2de519ca /configure.ac | |
| parent | d664ae1182c29b74b409bc8594b7bd0575e91ce9 (diff) | |
[build] Test for GNU-style PIE support in toolchain and enable
2008-08-13 Paul P Komkoff Jr <i@stingr.net>
* configure.ac: add a configure flag and autoconf macro, which will
determine if your toolchain supports PIE.
* */Makefile.am: add corresponding CFLAGS and LDFLAGS into
appropriate places.
Signed-off-by: Paul Jakma <paul@quagga.net>
Diffstat (limited to 'configure.ac')
| -rwxr-xr-x | configure.ac | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 746b5cea..5c6c0d7d 100755 --- a/configure.ac +++ b/configure.ac @@ -60,9 +60,10 @@ fi dnl -------------------- dnl Check CC and friends dnl -------------------- +AC_LANG([C]) AC_PROG_CC AC_PROG_CPP - +AM_PROG_CC_C_O AC_PROG_EGREP dnl autoconf 2.59 appears not to support AC_PROG_SED @@ -1395,6 +1396,31 @@ dnl ---------- CONFDATE=`date '+%Y%m%d'` AC_SUBST(CONFDATE) +dnl Conditionally enable PIE support for GNU toolchains. +enable_pie=yes + +AC_ARG_ENABLE(pie, AS_HELP_STRING([--disable-pie], [Do not build tools as a Position Independent Executables])) +if test "$enable_pie" = "yes"; then + AC_CACHE_CHECK([whether $CC accepts PIE flags], [ap_cv_cc_pie], [ + save_CFLAGS=$CFLAGS + save_LDFLAGS=$LDFLAGS + CFLAGS="$CFLAGS -fPIE" + LDFLAGS="$LDFLAGS -pie" + AC_LINK_IFELSE([AC_LANG_SOURCE([[static int foo[30000]; int main () { return 0; }]])], + [ap_cv_cc_pie=yes], [ap_cv_cc_pie=no] + ) + CFLAGS=$save_CFLAGS + LDFLAGS=$save_LDFLAGS + ]) + if test "$ap_cv_cc_pie" = "yes"; then + PICFLAGS="-fPIE" + PILDFLAGS="-pie" + fi +fi + +AC_SUBST(PICFLAGS) +AC_SUBST(PILDFLAGS) + dnl ------------------------------ dnl set paths for state directory dnl ------------------------------ |