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| author | Benny Baumann <BenBE@geshi.org> | 2020-09-18 19:32:41 +0200 |
|---|---|---|
| committer | Benny Baumann <BenBE@geshi.org> | 2020-09-29 18:07:17 +0200 |
| commit | 2cde4a7f8eef5f4b4701128b272d529c74f5cfc1 (patch) | |
| tree | fbb29ddee2af8b9a8c292bbd7269ddb33ab80d0b /configure.ac | |
| parent | e1c96879f444150b01c7f556cacdca82c811efb1 (diff) | |
Enable NULL pointer checks via compiler if supported
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index d06c598f..5302f1e6 100644 --- a/configure.ac +++ b/configure.ac @@ -169,6 +169,23 @@ m4_define([HTOP_CHECK_LIB], ], [$4]) ]) +dnl https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html +AC_DEFUN([AX_CHECK_COMPILE_FLAG], +[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl +AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ + ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS + _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" + AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], + [AS_VAR_SET(CACHEVAR,[yes])], + [AS_VAR_SET(CACHEVAR,[no])]) + _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) +AS_VAR_IF(CACHEVAR,yes, + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_COMPILE_FLAGS + AC_ARG_ENABLE(unicode, [AS_HELP_STRING([--enable-unicode], [enable Unicode support])], ,enable_unicode="yes") if test "x$enable_unicode" = xyes; then HTOP_CHECK_SCRIPT([ncursesw6], [addnwstr], [HAVE_LIBNCURSESW], "ncursesw6-config", @@ -291,6 +308,8 @@ AM_CFLAGS="\ -Wunused\ -Wwrite-strings" +AX_CHECK_COMPILE_FLAG([-Wnull-dereference], [AM_CFLAGS="$AM_CFLAGS -Wnull-dereference"], , [-Werror]) + AC_ARG_ENABLE([werror], [AS_HELP_STRING([--enable-werror], [Treat warnings as errors (default: warnings are not errors)])], [enable_werror="$enableval"], [enable_werror=no]) AS_IF([test "x$enable_werror" = "xyes"], [AM_CFLAGS="$AM_CFLAGS -Werror"]) AC_SUBST([AM_CFLAGS]) |