From: Thomas Petazzoni Date: Sat, 30 Mar 2019 14:29:23 +0000 (+0100) Subject: tools/Makefile: build host tools with -std=gnu99 X-Git-Tag: v2019.04~7^2 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=d7edeba79b2776a2097adf952b3b392c2dfb036b;p=oweals%2Fu-boot.git tools/Makefile: build host tools with -std=gnu99 Parts of the code are using C99 constructs (such as variables declared inside loops), but also GNU extensions (such as typeof), so using -std=gnu99 is necessary to build with older versions of gcc that don't default to building with gnu99. It fixes the following build failure: ./tools/../lib/crc16.c: In function "crc16_ccitt": ./tools/../lib/crc16.c:70:2: error: "for" loop initial declarations are only allowed in C99 mode for (int i = 0; i < len; i++) ^ ./tools/../lib/crc16.c:70:2: note: use option -std=c99 or -std=gnu99 to compile your code when building the host tools with gcc 4.7. Signed-off-by: Thomas Petazzoni Reviewed-by: Philipp Tomsich --- diff --git a/tools/Makefile b/tools/Makefile index 081383d7a7..d377d85f74 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -254,7 +254,8 @@ HOST_EXTRACFLAGS += -include $(srctree)/include/compiler.h \ -I$(srctree)/tools \ -DUSE_HOSTCC \ -D__KERNEL_STRICT_NAMES \ - -D_GNU_SOURCE + -D_GNU_SOURCE \ + -std=gnu99 __build: $(LOGO-y)