X-Git-Url: http://git.efficios.com/?p=argpar.git;a=blobdiff_plain;f=configure.ac;h=8464b8cfe2c4eeb5d54f30beddccd9c9bac51ef9;hp=01f70d7f16a3adb44dccfd60db739928f7b9015e;hb=871eba329ad77b01051cd29ec372f8ae5a401882;hpb=7ac57709d4964e2c59c9b0592632c374056caa00

diff --git a/configure.ac b/configure.ac
index 01f70d7..8464b8c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,9 +4,48 @@ LT_INIT
 
 AC_CONFIG_MACRO_DIRS([m4])
 
+AC_USE_SYSTEM_EXTENSIONS
+
 # Depend on glib just for the tests.
 PKG_CHECK_MODULES([GLIB], [glib-2.0])
 
+# When given, add -Werror to WARN_CFLAGS and WARN_CXXFLAGS.
+# Disabled by default
+AE_FEATURE_DEFAULT_DISABLE
+AE_FEATURE([Werror],[Treat compiler warnings as errors.])
+
+# Detect warning flags supported by the C compiler and append them to
+# WARN_CFLAGS.
+#
+m4_define([WARN_FLAGS_LIST], [ dnl
+  -Wall dnl
+  -Wextra dnl
+  -Wmissing-prototypes dnl
+  -Wmissing-declarations dnl
+  -Wnull-dereference dnl
+  -Wundef dnl
+  -Wredundant-decls dnl
+  -Wshadow dnl
+  -Wjump-misses-init dnl
+  -Wsuggest-attribute=format dnl
+  -Wtautological-constant-out-of-range-compare dnl
+  -Wnested-externs dnl
+  -Wwrite-strings dnl
+  -Wformat=2 dnl
+  -Wstrict-aliasing dnl
+  -Wmissing-noreturn dnl
+  -Winit-self dnl
+  -Wduplicated-cond dnl
+  -Wduplicated-branches dnl
+  -Wlogical-op dnl
+])
+
+AX_APPEND_COMPILE_FLAGS([WARN_FLAGS_LIST], [WARN_CFLAGS], [-Werror])
+AE_IF_FEATURE_ENABLED([Werror], [WARN_CFLAGS="${WARN_CFLAGS} -Werror"])
+AM_CFLAGS="${AM_CFLAGS} ${WARN_CFLAGS}"
+
+AC_SUBST(AM_CFLAGS)
+
 AC_CONFIG_FILES([
 	Makefile
 	argpar/Makefile