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Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 5a2dc373..36a6b6c2 100644 --- a/configure.ac +++ b/configure.ac @@ -197,6 +197,15 @@ if test "$ac_cv_zdefs" = "yes"; then dso_LDFLAGS="$dso_LDFLAGS $ZDEFS_LDFLAGS" fi +# We really want build-ids. Warn and force generating them if gcc was +# configure without --enable-linker-build-id +AC_CACHE_CHECK([whether the compiler generates build-ids], ac_cv_buildid, [dnl +AC_LINK_IFELSE([AC_LANG_PROGRAM()],[ac_cv_buildid=yes; readelf -n conftest$EXEEXT | grep -q NT_GNU_BUILD_ID || ac_cv_buildid=no],AC_MSG_FAILURE([unexpected compile failure]))]) +if test "$ac_cv_buildid" = "no"; then + AC_MSG_WARN([compiler doesn't generate build-id by default]) + LDFLAGS="$LDFLAGS -Wl,--build-id" +fi + ZRELRO_LDFLAGS="-Wl,-z,relro" AC_CACHE_CHECK([whether gcc supports $ZRELRO_LDFLAGS], ac_cv_zrelro, [dnl save_LDFLAGS="$LDFLAGS" |