10.3/kernel-gcc.diff

Allow the kernel source be compiled with gcc(1).

diff -ru --exclude-from freebsd-src-diff-exclude-names /var/tmp/freebsd-10.3-src/usr/src/sys/conf/kern.mk freebsd-10.3/usr/src/sys/conf/kern.mk
--- /var/tmp/freebsd-10.3-src/usr/src/sys/conf/kern.mk	2016-03-25 09:09:25.000000000 +0800
+++ freebsd-10.3/usr/src/sys/conf/kern.mk	2019-03-11 18:48:05.993101370 +0800
@@ -29,22 +29,24 @@
 # enough to error out the whole kernel build.  Display them anyway, so there is
 # some incentive to fix them eventually.
 CWARNEXTRA?=	-Wno-error-tautological-compare -Wno-error-empty-body \
-		-Wno-error-parentheses-equality -Wno-error-unused-function \
-		${NO_WFORMAT}
+		-Wno-error-parentheses-equality -Wno-error-unused-function
 .endif
 
 .if ${COMPILER_TYPE} == "gcc"
 # For gcc 4.2, eliminate the too-often-wrong warnings about uninitialized vars.
-CWARNEXTRA?=	-Wno-uninitialized
+CWARNEXTRA?=	-Wno-uninitialized -Wno-unused-but-set-variable \
+		-Wno-error=inline -Wno-error=address
 .endif
 
+CWARNEXTRA+=	${NO_WFORMAT}
+
 # External compilers may not support our format extensions.  Allow them
 # to be disabled.  WARNING: format checking is disabled in this case.
-.if ${MK_FORMAT_EXTENSIONS} == "no"
+#.if ${MK_FORMAT_EXTENSIONS} == "no"
 NO_WFORMAT=		-Wno-format
-.else
-FORMAT_EXTENSIONS=	-fformat-extensions
-.endif
+#.else
+#FORMAT_EXTENSIONS=	-fformat-extensions
+#.endif
 
 #
 # On i386, do not align the stack to 16-byte boundaries.  Otherwise GCC 2.95
@@ -67,7 +69,7 @@
 #
 .if ${MACHINE_CPUARCH} == "i386"
 .if ${COMPILER_TYPE} != "clang"
-CFLAGS+=	-mno-align-long-strings -mpreferred-stack-boundary=2
+CFLAGS+=	-mpreferred-stack-boundary=2
 .else
 CFLAGS+=	-mno-aes -mno-avx
 .endif
diff -ru --exclude-from freebsd-src-diff-exclude-names /var/tmp/freebsd-src/usr/src/sys/conf/kmod.mk freebsd-10.3/usr/src/sys/conf/kmod.mk
--- /var/tmp/freebsd-src/usr/src/sys/conf/kmod.mk	2016-03-25 09:09:25.000000000 +0800
+++ freebsd-10.3/usr/src/sys/conf/kmod.mk	2016-12-06 12:42:01.344048915 +0800
@@ -94,7 +94,7 @@
 .if !empty(CFLAGS:M-O[23s]) && empty(CFLAGS:M-fno-strict-aliasing)
 CFLAGS+=	-fno-strict-aliasing
 .endif
-WERROR?=	-Werror
+#WERROR?=	-Werror
 CFLAGS+=	${WERROR}
 CFLAGS+=	-D_KERNEL
 CFLAGS+=	-DKLD_MODULE