From: Florian Weimer <fweimer@redhat.com>
To: linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] Define _GNU_SOURCE for a declaration of strptime
Date: Wed, 14 Dec 2022 22:32:39 +0100 [thread overview]
Message-ID: <87fsdhllhk.fsf@oldenburg.str.redhat.com> (raw)
This is needed for compatibility with future C compilers which reject
implicit function declarations by default. Without _GNU_SOURCE (or a
similar feature test macro), <time.h> does not declare the strptime
function, and compilation can fail.
---
Make.rules | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Make.rules b/Make.rules
index 903a5a4..d4de1ef 100644
--- a/Make.rules
+++ b/Make.rules
@@ -14,7 +14,7 @@ else
$(error unknown architecture $(ARCH))
endif
INCDIR = -I$(TOPDIR)include/ -I/usr/include/efi -I/usr/include/efi/$(ARCH) -I/usr/include/efi/protocol
-CPPFLAGS = -DCONFIG_$(ARCH)
+CPPFLAGS = -DCONFIG_$(ARCH) -D_GNU_SOURCE
CFLAGS = -O2 -g $(ARCH3264) -fpic -Wall -fshort-wchar -fno-strict-aliasing -fno-merge-constants -fno-stack-protector -ffreestanding -fno-stack-check
LDFLAGS = -nostdlib
CRTOBJ = crt0-efi-$(ARCH).o
Related to:
<https://fedoraproject.org/wiki/Changes/PortingToModernC>
<https://fedoraproject.org/wiki/Toolchain/PortingToModernC>
reply other threads:[~2022-12-14 21:33 UTC|newest]
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