diff options
Diffstat (limited to 'libiberty/configure.ac')
| -rw-r--r-- | libiberty/configure.ac | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/libiberty/configure.ac b/libiberty/configure.ac index e77bac7..a57685a 100644 --- a/libiberty/configure.ac +++ b/libiberty/configure.ac @@ -113,9 +113,25 @@ GCC_NO_EXECUTABLES AC_PROG_CC AC_PROG_CPP_WERROR +# Warn C++ incompatibilities if supported. +AC_CACHE_CHECK( + [whether ${CC} accepts -Wc++-compat], + [ac_cv_prog_cc_w_cxx_compat], + [save_CFLAGS="$CFLAGS" + CFLAGS="-Wc++-compat" + AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]])], + [ac_cv_prog_cc_w_cxx_compat=yes], + [ac_cv_prog_cc_w_cxx_compat=no]) + CFLAGS="$save_CFLAGS" + ]) + + if test x$GCC = xyes; then ac_libiberty_warn_cflags='-W -Wall -pedantic -Wwrite-strings -Wstrict-prototypes' fi +if test $ac_cv_prog_cc_w_cxx_compat = yes ; then + ac_libiberty_warn_cflags="${ac_libiberty_warn_cflags} -Wc++-compat" +fi AC_SUBST(ac_libiberty_warn_cflags) AC_PROG_CC_C_O |