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| author | Peter Rajnoha <prajnoha@redhat.com> | 2013-12-04 09:58:58 +0100 |
|---|---|---|
| committer | Peter Rajnoha <prajnoha@redhat.com> | 2013-12-04 13:30:08 +0100 |
| commit | 6c6bcc00e401262db3b906259674a3231a119603 (patch) | |
| tree | 021fe959878927f3a8de641429987a76fcf494b7 /acinclude.m4 | |
| parent | 163666e513848e5d43d3e4f2f91b42d1a8f483a0 (diff) | |
| download | lvm2-6c6bcc00e401262db3b906259674a3231a119603.tar.gz | |
configure: check compiler/linker support for RELRO and PIE options
Also, add AC_TRY_LDFLAGS m4 macro to help with checking ld flags.
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index bf9fe0979..b9473db17 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -36,3 +36,24 @@ AC_DEFUN([AC_TRY_CCFLAG], ifelse([$4], [], [:], [$4]) fi ]) + +dnl AC_TRY_LDFLAGS([LDFLAGS], [VAR], [ACTION-IF-WORKS], [ACTION-IF-FAILS]) +dnl check if $CC supports given ld flags + +AC_DEFUN([AC_TRY_LDFLAGS], +[ + AC_REQUIRE([AC_PROG_CC]) + ac_save_LDFLAGS=$LDFLAGS + LDFLAGS=$1 + AC_CACHE_CHECK([whether $CC accepts $1 ld flags], [ac_cv_flag_$2], + [AC_LINK_IFELSE([AC_LANG_PROGRAM()], + [AS_VAR_SET([ac_cv_flag_$2], [yes])], + [AS_VAR_SET([ac_cv_flag_$2], [no])])]) + LDLAGS=$ac_save_LDFLAGS + $2=AS_VAR_GET([ac_cv_flag_$2]) + if test "$2" = yes; then + ifelse([$3], [], [:], [$3]) + else + ifelse([$4], [], [:], [$4]) + fi +]) |