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Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index f1bdbb7e..62e5459b 100644 --- a/configure.ac +++ b/configure.ac @@ -99,6 +99,52 @@ if test "x$with_included_ltdl" != "xyes"; then CFLAGS="$save_CFLAGS" fi +AC_ARG_ENABLE([gcc-warnings], + [AS_HELP_STRING([--enable-gcc-warnings], + [turn on lots of GCC warnings (for developers)])], + [case $enableval in + yes|no) ;; + *) AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;; + esac + gl_gcc_warnings=$enableval], + [gl_gcc_warnings=no] +) + +if test "$gl_gcc_warnings" = yes; then + gl_WARN_ADD([-Werror], [WERROR_CFLAGS]) + AC_SUBST([WERROR_CFLAGS]) + + nw= + nw="$nw -Waggregate-return" # C90 is anachronistic + nw="$nw -Wlong-long" # C90 is anachronistic + nw="$nw -Wundef" # Warns on '#if GNULIB_FOO' etc in gnulib + nw="$nw -Wtraditional" # Warns on #elif which we use often + nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings + nw="$nw -Wpadded" # Our structs are not packed + nw="$nw -Wredundant-decls" # Gnulib has multiple decls + nw="$nw -Wformat-nonliteral" # Needed in builtin.c + nw="$nw -Wunreachable-code" # Needed in output.c + nw="$nw -Wconversion" # Too many warnings for now + nw="$nw -Wsign-conversion" # Too many warnings for now + nw="$nw -Wtraditional-conversion" # Too many warnings for now + nw="$nw -Wcast-qual" # Too many warnings for now + nw="$nw -Wswitch-enum" # Too many warnings for now + # This, $nw, is the list of warnings we disable. + + gl_MANYWARN_ALL_GCC([ws]) + gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw]) + for w in $ws; do + gl_WARN_ADD([$w]) + done + + gl_WARN_ADD([-fdiagnostics-show-option]) + gl_WARN_ADD([-funit-at-a-time]) + + AC_SUBST([WARN_CFLAGS]) + + AC_DEFINE([_FORTIFY_SOURCE], [2], + [enable compile-time and run-time bounds-checking, and some warnings]) +fi # Use gcc's -pipe option if available: for faster compilation. case "$CFLAGS" in |