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| author | Michael Biebl <biebl@debian.org> | 2017-05-11 14:55:55 +0200 |
|---|---|---|
| committer | Michael Biebl <biebl@debian.org> | 2017-05-11 14:55:55 +0200 |
| commit | c333f062ddcba9b35330647bf6cbd0a07f2d786e (patch) | |
| tree | 257c3a0c74c09f4ad2328eab5b932806405f0c1c /m4/compiler_options.m4 | |
| parent | a222e56e103f949b148a6942e385ccca2c26d9f3 (diff) | |
New upstream version 1.8.0 upstream/1.8.0
Diffstat (limited to 'm4/compiler_options.m4')
| -rw-r--r-- | m4/compiler_options.m4 | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/m4/compiler_options.m4 b/m4/compiler_options.m4 index c998711d..23929af8 100644 --- a/m4/compiler_options.m4 +++ b/m4/compiler_options.m4 @@ -119,8 +119,46 @@ if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then [int f () { int i = yolo; yolo; return i; }] ) + dnl clang 3.9 would like to see "{ { 0 } }" here, but that does not + dnl look too wise. + NM_COMPILER_WARNING([missing-braces], + [union { int a[1]; int b[2]; } c = { 0 }] + ) + CFLAGS="$CFLAGS_MORE_WARNINGS $CFLAGS" else AC_MSG_RESULT(no) fi ]) + +AC_DEFUN([NM_LTO], +[AC_ARG_ENABLE(lto, AS_HELP_STRING([--enable-lto], [Enable Link Time Optimization for smaller size (default: no)])) +if (test "${enable_lto}" = "yes"); then + CC_CHECK_FLAG_APPEND([lto_flags], [CFLAGS], [-flto]) + if (test -n "${lto_flags}"); then + CFLAGS="-flto $CFLAGS" + else + AC_MSG_ERROR([Link Time Optimization -flto is not supported.]) + fi +else + enable_lto='no' +fi +]) + +AC_DEFUN([NM_LD_GC], +[AC_ARG_ENABLE(ld-gc, AS_HELP_STRING([--enable-ld-gc], [Enable garbage collection of unused symbols on linking (default: auto)])) +if (test "${enable_ld_gc}" != "no"); then + CC_CHECK_FLAG_APPEND([ld_gc_flags], [CFLAGS], [-fdata-sections -ffunction-sections -Wl,--gc-sections]) + if (test -n "${ld_gc_flags}"); then + enable_ld_gc="yes" + CFLAGS="$ld_gc_flags $CFLAGS" + else + if (test "${enable_ld_gc}" = "yes"); then + AC_MSG_ERROR([Unused symbol eviction requested but not supported.]) + else + enable_ld_gc="no" + fi + fi +fi +]) + |