Date: Sat, 5 Nov 2011 21:16:40 +0000 (UTC) From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r227120 - head Message-ID: <201111052116.pA5LGeFx085056@svn.freebsd.org>
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Author: dim Date: Sat Nov 5 21:16:39 2011 New Revision: 227120 URL: http://svn.freebsd.org/changeset/base/227120 Log: Make it possible to set CC and CXX (and optionally, AS and LD) in make.conf(5), while allowing the build32 stage on 64-bit architectures to still override them, so that stage can successfully build 32-bit compatibility libraries. Explanation: 1) The build32 stage sets environment variables CC, CXX, AS and LD for its sub-make, to add 32-bit specific flags (-m32 and such). 2) The sub-make reads sys.mk, encounters CC?= and CXX?= assignments, so does not alter them. 3) After some other stuff, sys.mk reads /etc/make.conf. When you have "CC=xxx" and "CXX=yyy" statements in there, they will *override* the build32-supplied CC/CXX values, nullifying the 32-bit specific flags. 4) Thus all objects get built as 64-bit anyway, and since LD is usually not set in make.conf, it still has the 32-bit flags! 5) Now, whenever something is linked, you will get a "ld: Relocatable linking with relocations from format elf64-x86-64-freebsd (foo.o) to format elf32-i386-freebsd (bar.o) is not supported" error. Fix this by adding "-ECC -ECXX -EAS -ELD" to the build32 sub-make invocation, which forces those environment variables to always override any assignment in makefiles. Thus making it possible to simply set: CC=my-cc CXX=my-c++ in your make.conf, or specify a path, even: CC=/usr/local/bin/other-cc CXX=/usr/local/bin/other-c++ Note this was never a problem on i386, since it has no build32 stage. Silence from: current@ MFC after: 1 week Modified: head/Makefile.inc1 Modified: head/Makefile.inc1 ============================================================================== --- head/Makefile.inc1 Sat Nov 5 19:58:05 2011 (r227119) +++ head/Makefile.inc1 Sat Nov 5 21:16:39 2011 (r227120) @@ -313,7 +313,8 @@ LIB32WMAKEENV+= MAKEOBJDIRPREFIX=${OBJTR LIB32WMAKE= ${LIB32WMAKEENV} ${MAKE} -DNO_CPU_CFLAGS -DCOMPAT_32BIT \ -DWITHOUT_BIND -DWITHOUT_MAN -DWITHOUT_INFO \ - -DWITHOUT_HTML -DNO_CTF -DNO_LINT DESTDIR=${LIB32TMP} + -DWITHOUT_HTML -DNO_CTF -DNO_LINT -ECC -ECXX -EAS -ELD \ + DESTDIR=${LIB32TMP} LIB32IMAKE= ${LIB32WMAKE:NINSTALL=*:NDESTDIR=*} -DNO_INCS .endif
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