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| author | Timm Bäder <tbaeder@redhat.com> | 2021-02-17 10:27:07 +0100 |
|---|---|---|
| committer | Mark Wielaard <mark@klomp.org> | 2021-03-06 03:05:51 +0100 |
| commit | 00d92d0b6a495a81e4c585be7a41f10ef4b6d47c (patch) | |
| tree | 872892409bfc43c24a4c8f8792affbe67599d4b0 | |
| parent | f82f46fc6880509a539ed8194e9616d818eae88d (diff) | |
| download | elfutils-00d92d0b6a495a81e4c585be7a41f10ef4b6d47c.tar.gz | |
build: Check for -Wtrampolines support
Clang does not support -Wtrampolines, so check if the compiler supports
it before using it.
Signed-off-by: Timm Bäder <tbaeder@redhat.com>
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | config/ChangeLog | 6 | ||||
| -rw-r--r-- | config/eu.am | 10 | ||||
| -rw-r--r-- | configure.ac | 9 |
4 files changed, 27 insertions, 2 deletions
@@ -1,3 +1,7 @@ +2021-02-17 Timm Bäder <tbaeder@redhat.com> + + * configure.ac: Add -Wtrampolines check. + 2021-02-05 Mark Wielaard <mark@klomp.org> * configure.ac (AC_INIT): Set version to 0.183. diff --git a/config/ChangeLog b/config/ChangeLog index e877bdda..cd8ff74c 100644 --- a/config/ChangeLog +++ b/config/ChangeLog @@ -1,3 +1,9 @@ +2021-02-17 Timm Bäder <tbaeder@redhat.com> + + * eu.am (TRAMPOLINES_WARNING): New variable. + (AM_CFLAGS): Use TRAMPOLINES_WARNING. + (AM_CXXFLAGS): Likewise. + 2021-02-12 Mark Wielaard <mark@klomp.org> * elfutils.spec.in: Escape %%check in comment. diff --git a/config/eu.am b/config/eu.am index e109ffd3..02512570 100644 --- a/config/eu.am +++ b/config/eu.am @@ -73,8 +73,14 @@ else IMPLICIT_FALLTHROUGH_WARNING= endif +if HAVE_TRAMPOLINES_WARNING +TRAMPOLINES_WARNING=-Wtrampolines +else +TRAMPOLINES_WARNING= +endif + AM_CFLAGS = -std=gnu99 -Wall -Wshadow -Wformat=2 \ - -Wold-style-definition -Wstrict-prototypes -Wtrampolines \ + -Wold-style-definition -Wstrict-prototypes $(TRAMPOLINES_WARNING) \ $(LOGICAL_OP_WARNING) $(DUPLICATED_COND_WARNING) \ $(NULL_DEREFERENCE_WARNING) $(IMPLICIT_FALLTHROUGH_WARNING) \ $(if $($(*F)_no_Werror),,-Werror) \ @@ -84,7 +90,7 @@ AM_CFLAGS = -std=gnu99 -Wall -Wshadow -Wformat=2 \ $($(*F)_CFLAGS) AM_CXXFLAGS = -std=c++11 -Wall -Wshadow \ - -Wtrampolines \ + $(TRAMPOLINES_WARNING) \ $(LOGICAL_OP_WARNING) $(DUPLICATED_COND_WARNING) \ $(NULL_DEREFERENCE_WARNING) $(IMPLICIT_FALLTHROUGH_WARNING) \ $(if $($(*F)_no_Werror),,-Werror) \ diff --git a/configure.ac b/configure.ac index e56aeb6a..5f3321aa 100644 --- a/configure.ac +++ b/configure.ac @@ -537,6 +537,15 @@ if test "$ac_cv_implicit_fallthrough" = "yes"; then [Defined if __attribute__((fallthrough)) is supported]) fi +AC_CACHE_CHECK([whether the compiler accepts -Wtrampolines], ac_cv_trampolines, [dnl +old_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -Wtrampolines -Werror" +AC_COMPILE_IFELSE([AC_LANG_SOURCE([])], + ac_cv_trampolines=yes, ac_cv_trampolines=no) +CFLAGS="$old_CFLAGS"]) +AM_CONDITIONAL(HAVE_TRAMPOLINES_WARNING, + [test "x$ac_cv_trampolines" != "xno"]) + saved_LIBS="$LIBS" AC_SEARCH_LIBS([argp_parse], [argp]) LIBS="$saved_LIBS" |