From 9b05b26c8d1409727e02f443f38788f91faf64bb Mon Sep 17 00:00:00 2001
From: dim <dim@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Date: Sun, 10 Jun 2012 13:28:14 +0000
Subject: [PATCH] MFC r236528:

During buildworld and buildkernel, define EARLY_BUILD in the earlier
stages (build-tools, cross-tools, etc) of the build, so we can detect in
bsd.*.mk whether to pass compiler-specific flags to ${CC}.

In particular, this commit will allow using WITH_CLANG_IS_CC when the
base compiler is still gcc, and when ${CC}, ${CXX} and ${CPP} are left
at their defaults.  The early stages will then be built using gcc, and
no clang-specific flags will be passed to it.  The later stages will be
built as usual.

The EARLY_BUILD define can also serve other uses, such as building the
world stage C++ executables with libc++ instead of libstdc++: during the
early build stages, we cannot assume libc++ is already available, so we
must still build with libstdc++ at that time.


git-svn-id: svn://svn.freebsd.org/base/stable/9@236851 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
---
 Makefile.inc1       | 11 ++++++-----
 share/mk/bsd.sys.mk |  9 ++++++---
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/Makefile.inc1 b/Makefile.inc1
index 2c8bba5af..f235534c3 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -240,7 +240,7 @@ BMAKE=		MAKEOBJDIRPREFIX=${WORLDTMP} \
 		SSP_CFLAGS= \
 		-DWITHOUT_HTML -DWITHOUT_INFO -DNO_LINT -DWITHOUT_MAN \
 		-DNO_PIC -DWITHOUT_PROFILE -DNO_SHARED \
-		-DNO_CPU_CFLAGS -DNO_WARNS -DNO_CTF
+		-DNO_CPU_CFLAGS -DNO_WARNS -DNO_CTF -DEARLY_BUILD
 
 # build-tools stage
 TMAKE=		MAKEOBJDIRPREFIX=${OBJTREE} \
@@ -250,7 +250,7 @@ TMAKE=		MAKEOBJDIRPREFIX=${OBJTREE} \
 		BOOTSTRAPPING=${OSRELDATE} \
 		SSP_CFLAGS= \
 		-DNO_LINT \
-		-DNO_CPU_CFLAGS -DNO_WARNS -DNO_CTF
+		-DNO_CPU_CFLAGS -DNO_WARNS -DNO_CTF -DEARLY_BUILD
 
 # cross-tools stage
 XMAKE=		TOOLS_PREFIX=${WORLDTMP} ${BMAKE} \
@@ -492,7 +492,8 @@ build32:
 .for _dir in lib/ncurses/ncurses lib/ncurses/ncursesw lib/libmagic
 	cd ${.CURDIR}/${_dir}; \
 	    MAKEOBJDIRPREFIX=${OBJTREE}/lib32 ${MAKE} SSP_CFLAGS= DESTDIR= \
-	    DIRPRFX=${_dir}/ build-tools
+	    DIRPRFX=${_dir}/ -DNO_LINT -DNO_CPU_CFLAGS -DNO_WARNS -DNO_CTF \
+	    -DEARLY_BUILD build-tools
 .endfor
 	cd ${.CURDIR}; \
 	    ${LIB32WMAKE} -f Makefile.inc1 libraries
@@ -834,7 +835,7 @@ buildkernel:
 	cd ${KRNLOBJDIR}/${_kernel}; \
 	    PATH=${BPATH}:${PATH} \
 	    MAKESRCPATH=${KERNSRCDIR}/dev/aic7xxx/aicasm \
-	    ${MAKE} SSP_CFLAGS= -DNO_CPU_CFLAGS -DNO_CTF \
+	    ${MAKE} SSP_CFLAGS= -DNO_CPU_CFLAGS -DNO_CTF -DEARLY_BUILD \
 	    -f ${KERNSRCDIR}/dev/aic7xxx/aicasm/Makefile
 # XXX - Gratuitously builds aicasm in the ``makeoptions NO_MODULES'' case.
 .if !defined(MODULES_WITH_WORLD) && !defined(NO_MODULES) && exists(${KERNSRCDIR}/modules)
@@ -842,7 +843,7 @@ buildkernel:
 	cd ${KERNSRCDIR}/modules/aic7xxx/aicasm; \
 	    PATH=${BPATH}:${PATH} \
 	    MAKEOBJDIRPREFIX=${KRNLOBJDIR}/${_kernel}/modules \
-	    ${MAKE} SSP_CFLAGS= -DNO_CPU_CFLAGS -DNO_CTF ${target}
+	    ${MAKE} SSP_CFLAGS= -DNO_CPU_CFLAGS -DNO_CTF -DEARLY_BUILD ${target}
 .endfor
 .endif
 .if !defined(NO_KERNELDEPEND)
diff --git a/share/mk/bsd.sys.mk b/share/mk/bsd.sys.mk
index f02375017..28c1a1814 100644
--- a/share/mk/bsd.sys.mk
+++ b/share/mk/bsd.sys.mk
@@ -61,7 +61,8 @@ 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" || ${CC:T:Mclang} == "clang"
+.if (${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang") && \
+    !defined(EARLY_BUILD)
 .if ${WARNS} <= 6
 CWARNFLAGS+=	-Wno-empty-body -Wno-string-plus-int
 .endif # WARNS <= 6
@@ -88,7 +89,8 @@ 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" || ${CC:T:Mclang} == "clang"
+.if (${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang") && \
+    !defined(EARLY_BUILD)
 .if ${WARNS} <= 3
 CWARNFLAGS+=	-Wno-format-nonliteral
 .endif # WARNS <= 3
@@ -109,7 +111,8 @@ CWARNFLAGS+=	-Wno-format
 CWARNFLAGS+=	-Wno-unknown-pragmas
 .endif # IGNORE_PRAGMA
 
-.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang"
+.if (${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "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
-- 
2.45.0