This patch conditionalizes a pair of FreeBSD compiler extensions so
that its CFLAGS are only used on FreeBSD.
--
Robert Millan
Index: sys/conf/kern.mk
===================================================================
--- sys/conf/kern.mk (revision 223736)
+++ sys/conf/kern.mk (working copy)
@@ -1,11 +1,21 @@
# $FreeBSD$
+.if !defined(OPSYS)
+OPSYS!= uname -s
+.endif
+
#
# Warning flags for compiling the kernel and components of the kernel:
#
+.if ${OPSYS} == "FreeBSD"
+# FreeBSD extension, not available in upstream GCC
+format_extensions= -fformat-extensions
+no_align_long_strings= -mno-align-long-strings
+.endif
+
CWARNFLAGS?= -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes \
-Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual \
- -Wundef -Wno-pointer-sign -fformat-extensions \
+ -Wundef -Wno-pointer-sign ${format_extensions} \
-Wmissing-include-dirs -fdiagnostics-show-option
#
# The following flags are next up for working on:
@@ -32,7 +42,7 @@
#
.if ${MACHINE_CPUARCH} == "i386"
.if ${CC:T:Mclang} != "clang"
-CFLAGS+= -mno-align-long-strings -mpreferred-stack-boundary=2 -mno-sse
+CFLAGS+= ${no_align_long_strings} -mpreferred-stack-boundary=2 -mno-sse
.else
CFLAGS+= -mno-aes -mno-avx
.endif
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