build: define project CFLAGS inside main autotools configs

Good projects should always use these flag combinations -- not just
when autogen.sh is called, but also when ./configure is run.

3 files changed, 10 insertions, 9 deletions

diff --git a/Makefile.am b/Makefile.am
index cabd857..79be23f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -9,7 +9,7 @@ AM_CPPFLAGS = \
 	-DSYSCONFDIR=\""$(sysconfdir)"\" \
 	-DLIBEXECDIR=\""$(libexecdir)"\"
 
-AM_CFLAGS = \
+AM_CFLAGS = ${my_CFLAGS} \
 	-fvisibility=hidden \
 	-ffunction-sections \
 	-fdata-sections
diff --git a/autogen.sh b/autogen.sh
index 6541826..d8ec7ed 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -2,13 +2,6 @@
 
 autoreconf --install --symlink
 
-MYCFLAGS="-g -Wall \
--Wmissing-declarations -Wmissing-prototypes \
--Wnested-externs -Wpointer-arith \
--Wpointer-arith -Wsign-compare -Wchar-subscripts \
--Wstrict-prototypes -Wshadow \
--Wformat-security -Wtype-limits"
-
 libdir() {
 	echo $(cd $1/$(gcc -print-multi-os-directory); pwd)
 }
@@ -17,4 +10,4 @@ args="--prefix=/usr \
 --sysconfdir=/etc \
 --libdir=$(libdir /usr/lib)"
 
-exec ./configure $args CFLAGS="${MYCFLAGS} ${CFLAGS}" "$@"
+exec ./configure $args "$@"
diff --git a/configure.ac b/configure.ac
index b860301..24a6805 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,6 +29,14 @@ AS_IF([test "x$enable_debug" = "xyes"], [
 	AC_DEFINE(ENABLE_DEBUG, [1], [Debug messages.])
 ])
 
+my_CFLAGS="-Wall \
+-Wmissing-declarations -Wmissing-prototypes \
+-Wnested-externs -Wpointer-arith \
+-Wpointer-arith -Wsign-compare -Wchar-subscripts \
+-Wstrict-prototypes -Wshadow \
+-Wformat-security -Wtype-limits"
+AC_SUBST([my_CFLAGS])
+
 AC_CONFIG_HEADERS(config.h)
 AC_CONFIG_FILES([
 	Makefile