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authorJeff Mahoney <>2018-04-30 10:37:08 -0400
committerDavid Sterba <>2018-06-07 16:37:35 +0200
commiteb7b42003a7d3a1d4c0253c6d5a248c9078c6d19 (patch)
treef09fbe12c1bac6772668daa4fabc6f48e56bc835 /
parent1c73f56f5a41f44a6196d06675cfb0fcdd2bbd9d (diff)
btrfs-progs: build: detect whether -std=gnu90 is supported
GCC releases prior to 4.5.0 don't support -std=gnu90 so btrfs-progs won't build at all on older distros. We can detect whether the compiler supports -std=gnu90 and fall back to -std=gnu89 if it doesn't. AX_CHECK_COMPILE_FLAG is the right way to do this, but it depends on autoconf 2.64. AX_GCC_VERSION has been deprecated, so we'll use that only for earlier autoconf versions so we can drop it when we drop support for older autoconf releases. Signed-off-by: Jeff Mahoney <> Signed-off-by: David Sterba <>
Diffstat (limited to '')
1 files changed, 1 insertions, 0 deletions
diff --git a/ b/
index 52410f69..fb324614 100644
--- a/
+++ b/
@@ -4,6 +4,7 @@
CC = @CC@
LN_S = @LN_S@
AR = @AR@
RM = @RM@