Author: brooks
Date: Thu Sep 13 16:00:46 2012
New Revision: 240468
URL: http://svn.freebsd.org/changeset/base/240468
Log:
Introduce a new make variable COMPILER_TYPE that specifies what
type of compiler is being used (currently clang or gcc). COMPILER_TYPE
is set in the new bsd.compiler.mk file based on the value of the CC
variable or, should it prove informative, by running ${CC} --version
and examining the output.
To avoid negative performance impacts in the default case and correct
value for COMPILER_TYPE type is determined and passed in the environment
of submake instances while building world.
Replace adhoc attempts at determining the compiler type by examining
CC or MK_CLANG_IS_CC with checks of COMPILER_TYPE. This eliminates
bootstrapping complications when first setting WITH_CLANG_IS_CC.
Sponsored by: DARPA, AFRL
Reviewed by: Yamaya Takashi <yama...@kbh.biglobe.ne.jp>, imp, linimon
(with some modifications post review)
MFC after: 2 weeks
Added:
head/share/mk/bsd.compiler.mk (contents, props changed)
Modified:
head/Makefile.inc1
head/share/mk/Makefile
head/share/mk/bsd.sys.mk
head/sys/conf/kern.mk
head/sys/conf/kern.pre.mk
head/sys/conf/kmod.mk
Modified: head/Makefile.inc1
==============================================================================
--- head/Makefile.inc1 Thu Sep 13 15:51:18 2012 (r240467)
+++ head/Makefile.inc1 Thu Sep 13 16:00:46 2012 (r240468)
@@ -46,6 +46,7 @@ TARGET_ARCH=${TARGET}
.include <bsd.own.mk>
.include <bsd.arch.inc.mk>
+.include <bsd.compiler.mk>
# We must do share/info early so that installation of info `dir'
# entries works correctly. Do it first since it is less likely to
@@ -235,7 +236,8 @@ BMAKEENV= INSTALL="sh ${.CURDIR}/tools/i
PATH=${BPATH}:${PATH} \
WORLDTMP=${WORLDTMP} \
VERSION="${VERSION}" \
- MAKEFLAGS="-m ${.CURDIR}/tools/build/mk ${.MAKEFLAGS}"
+ MAKEFLAGS="-m ${.CURDIR}/tools/build/mk ${.MAKEFLAGS}" \
+ COMPILER_TYPE=${COMPILER_TYPE}
BMAKE= MAKEOBJDIRPREFIX=${WORLDTMP} \
${BMAKEENV} ${MAKE} -f Makefile.inc1 \
DESTDIR= \
@@ -270,6 +272,16 @@ WMAKEENV= ${CROSSENV} \
.if ${MK_CDDL} == "no"
WMAKEENV+= NO_CTF=1
.endif
+.if ${CC:T:Mgcc} == "gcc"
+WMAKE_COMPILER_TYPE= gcc
+.elif ${CC:T:Mclang} == "clang"
+WMAKE_COMPILER_TYPE= clang
+.elif ${MK_CLANG_IS_CC} == "no"
+WMAKE_COMPILER_TYPE= gcc
+.else
+WMAKE_COMPILER_TYPE= clang
+.endif
+WMAKEENV+= COMPILER_TYPE=${WMAKE_COMPILER_TYPE}
WMAKE= ${WMAKEENV} ${MAKE} -f Makefile.inc1 DESTDIR=${WORLDTMP}
.if ${TARGET_ARCH} == "amd64" || ${TARGET_ARCH} == "powerpc64"
@@ -313,7 +325,8 @@ LIB32WMAKEENV+= MAKEOBJDIRPREFIX=${OBJTR
CC="${CC} ${LIB32FLAGS}" \
CXX="${CXX} ${LIB32FLAGS}" \
LIBDIR=/usr/lib32 \
- SHLIBDIR=/usr/lib32
+ SHLIBDIR=/usr/lib32 \
+ COMPILER_TYPE=${WMAKE_COMPILER_TYPE}
LIB32WMAKE= ${LIB32WMAKEENV} ${MAKE} -DNO_CPU_CFLAGS -DCOMPAT_32BIT \
-DWITHOUT_BIND -DWITHOUT_MAN -DWITHOUT_INFO \
Modified: head/share/mk/Makefile
==============================================================================
--- head/share/mk/Makefile Thu Sep 13 15:51:18 2012 (r240467)
+++ head/share/mk/Makefile Thu Sep 13 16:00:46 2012 (r240468)
@@ -3,7 +3,8 @@
FILES= bsd.README
FILES+= bsd.arch.inc.mk
-FILES+= bsd.compat.mk bsd.cpu.mk bsd.dep.mk bsd.doc.mk bsd.dtrace.mk
+FILES+= bsd.compat.mk bsd.compiler.mk bsd.cpu.mk
+FILES+= bsd.dep.mk bsd.doc.mk bsd.dtrace.mk
FILES+= bsd.endian.mk
FILES+= bsd.files.mk bsd.crunchgen.mk bsd.incs.mk bsd.info.mk
bsd.init.mk
FILES+= bsd.kmod.mk
Added: head/share/mk/bsd.compiler.mk
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/share/mk/bsd.compiler.mk Thu Sep 13 16:00:46 2012
(r240468)
@@ -0,0 +1,21 @@
+# $FreeBSD$
+
+.if !defined(COMPILER_TYPE)
+. if ${CC:T:Mgcc} == "gcc"
+COMPILER_TYPE:= gcc
+. elif ${CC:T:Mclang} == "clang"
+COMPILER_TYPE:= clang
+. else
+_COMPILER_VERSION!= ${CC} --version
+. if ${_COMPILER_VERSION:Mgcc} == "gcc"
+COMPILER_TYPE:= gcc
+. elif ${_COMPILER_VERSION:M\(GCC\)} == "(GCC)"
+COMPILER_TYPE:= gcc
+. elif ${_COMPILER_VERSION:Mclang} == "clang"
+COMPILER_TYPE:= clang
+. else
+.error Unable to determing compiler type for ${CC}
+. endif
+. undef _COMPILER_VERSION
+. endif
+.endif
Modified: head/share/mk/bsd.sys.mk
==============================================================================
--- head/share/mk/bsd.sys.mk Thu Sep 13 15:51:18 2012 (r240467)
+++ head/share/mk/bsd.sys.mk Thu Sep 13 16:00:46 2012 (r240468)
@@ -8,6 +8,8 @@
# for GCC: http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html
+.include <bsd.compiler.mk>
+
# the default is gnu99 for now
CSTD?= gnu99
@@ -28,8 +30,8 @@ CFLAGS+= -std=${CSTD}
.if defined(WARNS)
.if ${WARNS} >= 1
CWARNFLAGS+= -Wsystem-headers
-.if !defined(NO_WERROR) && ((${MK_CLANG_IS_CC} == "no" && \
- ${CC:T:Mclang} != "clang") || !defined(NO_WERROR.clang))
+.if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \
+ || !defined(NO_WERROR.clang))
CWARNFLAGS+= -Werror
.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang)
.endif # WARNS >= 1
@@ -43,8 +45,8 @@ CWARNFLAGS+= -W -Wno-unused-parameter -W
.if ${WARNS} >= 4
CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
-Wunused-parameter
-.if !defined(NO_WCAST_ALIGN) && ((${MK_CLANG_IS_CC} == "no" && \
- ${CC:T:Mclang} != "clang") || !defined(NO_WCAST_ALIGN.clang))
+.if !defined(NO_WCAST_ALIGN) && (${COMPILER_TYPE} != "clang" \
+ || !defined(NO_WCAST_ALIGN.clang))
CWARNFLAGS+= -Wcast-align
.endif # !NO_WCAST_ALIGN && (!CLANG || !NO_WCAST_ALIGN.clang)
.endif # WARNS >= 4
@@ -61,8 +63,7 @@ CWARNFLAGS+= -Wno-uninitialized
CWARNFLAGS+= -Wno-pointer-sign
# Clang has more warnings enabled by default, and when using -Wall, so if WARNS
# is set to low values, these have to be disabled explicitly.
-.if (${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang") && \
- !defined(EARLY_BUILD)
+.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD)
.if ${WARNS} <= 6
CWARNFLAGS+= -Wno-empty-body -Wno-string-plus-int
.endif # WARNS <= 6
@@ -89,20 +90,18 @@ WFORMAT= 1
.if ${WFORMAT} > 0
#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args
-.if (${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang") && \
- !defined(EARLY_BUILD)
+.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD)
.if ${WARNS} <= 3
CWARNFLAGS+= -Wno-format-nonliteral
.endif # WARNS <= 3
.endif # CLANG
-.if !defined(NO_WERROR) && ((${MK_CLANG_IS_CC} == "no" && \
- ${CC:T:Mclang} != "clang") || !defined(NO_WERROR.clang))
+.if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \
+ || !defined(NO_WERROR.clang))
CWARNFLAGS+= -Werror
.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang)
.endif # WFORMAT > 0
.endif # WFORMAT
-.if defined(NO_WFORMAT) || ((${MK_CLANG_IS_CC} != "no" || \
- ${CC:T:Mclang} == "clang") && defined(NO_WFORMAT.clang))
+.if defined(NO_WFORMAT) || (${COMPILER_TYPE} == "clang" &&
defined(NO_WFORMAT.clang))
CWARNFLAGS+= -Wno-format
.endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang)
.endif # !NO_WARNS
@@ -111,8 +110,7 @@ CWARNFLAGS+= -Wno-format
CWARNFLAGS+= -Wno-unknown-pragmas
.endif # IGNORE_PRAGMA
-.if (${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang") && \
- !defined(EARLY_BUILD)
+.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD)
CLANG_NO_IAS= -no-integrated-as
CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
-mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret
Modified: head/sys/conf/kern.mk
==============================================================================
--- head/sys/conf/kern.mk Thu Sep 13 15:51:18 2012 (r240467)
+++ head/sys/conf/kern.mk Thu Sep 13 16:00:46 2012 (r240468)
@@ -15,7 +15,7 @@ CWARNFLAGS?= -Wall -Wredundant-decls -Wn
# Disable a few warnings for clang, since there are several places in the
# kernel where fixing them is more trouble than it is worth, or where there is
# a false positive.
-.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang"
+.if ${COMPILER_TYPE} == "clang"
NO_WCONSTANT_CONVERSION= -Wno-constant-conversion
NO_WARRAY_BOUNDS= -Wno-array-bounds
NO_WSHIFT_COUNT_NEGATIVE= -Wno-shift-count-negative
@@ -52,7 +52,7 @@ CWARNEXTRA?= -Wno-error-tautological-com
# Setting -mno-sse implies -mno-sse2, -mno-sse3, -mno-ssse3, -mno-sse41 and
-mno-sse42
#
.if ${MACHINE_CPUARCH} == "i386"
-.if ${MK_CLANG_IS_CC} == "no" && ${CC:T:Mclang} != "clang"
+.if ${COMPILER_TYPE} != "clang"
CFLAGS+= -mno-align-long-strings -mpreferred-stack-boundary=2
.else
CFLAGS+= -mno-aes -mno-avx
@@ -100,7 +100,7 @@ INLINE_LIMIT?= 15000
# (-mfpmath= is not supported)
#
.if ${MACHINE_CPUARCH} == "amd64"
-.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang"
+.if ${COMPILER_TYPE} == "clang"
CFLAGS+= -mno-aes -mno-avx
.endif
CFLAGS+= -mcmodel=kernel -mno-red-zone -mno-mmx -mno-sse -msoft-float \
Modified: head/sys/conf/kern.pre.mk
==============================================================================
--- head/sys/conf/kern.pre.mk Thu Sep 13 15:51:18 2012 (r240467)
+++ head/sys/conf/kern.pre.mk Thu Sep 13 16:00:46 2012 (r240468)
@@ -4,6 +4,7 @@
# of the definitions that need to be before %BEFORE_DEPEND.
.include <bsd.own.mk>
+.include <bsd.compiler.mk>
# backwards compat option for older systems.
MACHINE_CPUARCH?=${MACHINE_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb)?/arm/:C/powerpc64/powerpc/}
@@ -35,7 +36,7 @@ _MINUS_O= -O2
.endif
.endif
.if ${MACHINE_CPUARCH} == "amd64"
-.if ${MK_CLANG_IS_CC} == "no" && ${CC:T:Mclang} != "clang"
+.if ${COMPILER_TYPE} != "clang"
COPTFLAGS?=-O2 -frename-registers -pipe
.else
COPTFLAGS?=-O2 -pipe
@@ -85,7 +86,7 @@ INCLUDES+= -I$S/dev/cxgb -I$S/dev/cxgbe
CFLAGS= ${COPTFLAGS} ${C_DIALECT} ${DEBUG} ${CWARNFLAGS}
CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include
opt_global.h
-.if ${MK_CLANG_IS_CC} == "no" && ${CC:T:Mclang} != "clang"
+.if ${COMPILER_TYPE} != "clang"
CFLAGS+= -fno-common -finline-limit=${INLINE_LIMIT}
.if ${MACHINE_CPUARCH} != "mips"
CFLAGS+= --param inline-unit-growth=100
@@ -102,7 +103,7 @@ WERROR?= -Werror
# XXX LOCORE means "don't declare C stuff" not "for locore.s".
ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS}
-.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang"
+.if ${COMPILER_TYPE} == "clang"
CLANG_NO_IAS= -no-integrated-as
.endif
Modified: head/sys/conf/kmod.mk
==============================================================================
--- head/sys/conf/kmod.mk Thu Sep 13 15:51:18 2012 (r240467)
+++ head/sys/conf/kmod.mk Thu Sep 13 16:00:46 2012 (r240468)
@@ -73,6 +73,7 @@ OBJCOPY?= objcopy
.endif
.include <bsd.init.mk>
+.include <bsd.compiler.mk>
.SUFFIXES: .out .o .c .cc .cxx .C .y .l .s .S
@@ -108,7 +109,7 @@ CFLAGS+= -I. -I@
# for example.
CFLAGS+= -I@/contrib/altq
-.if ${MK_CLANG_IS_CC} == "no" && ${CC:T:Mclang} != "clang"
+.if ${COMPILER_TYPE} != "clang"
CFLAGS+= -finline-limit=${INLINE_LIMIT}
CFLAGS+= --param inline-unit-growth=100
CFLAGS+= --param large-function-growth=1000
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