From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Fri, 10 Oct 2014 03:25:01 +0000 (-0500)
Subject: build-sys: use -Wno-typedef-redefinition only for clang
X-Git-Tag: v217~254
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=4f47bb8c5e5f234c614dc14532a9483328e61002

build-sys: use -Wno-typedef-redefinition only for clang

Our checks for -Wno-xxx switches do not work with gcc [1].

[1] https://gcc.gnu.org/wiki/FAQ#wnowarning
---

diff --git a/configure.ac b/configure.ac
index caf1f0e54..d04f6f464 100644
--- a/configure.ac
+++ b/configure.ac
@@ -183,7 +183,6 @@ CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
         -Wno-unused-parameter \
         -Wno-missing-field-initializers \
         -Wno-unused-result \
-        -Wno-typedef-redefinition \
         -Werror=overflow \
         -Wdate-time \
         -Wnested-externs \
@@ -198,6 +197,11 @@ CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
         -fstack-protector-strong \
         -fPIE \
         --param=ssp-buffer-size=4])
+
+AS_CASE([$CC], [*clang*],
+        [CC_CHECK_FLAGS_APPEND([with_cppflags], [CPPFLAGS], [\
+               -Wno-typedef-redefinition])])
+
 AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],
         [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
                -flto -ffat-lto-objects])],