Yes, it is a GNU Make feature as far as I know. The + tells make that the rule is recursive and thus propagates the -j magic to sub makes. Normally it handles this magic automatically but for this to work you have to call sub makes with $(MAKE), if you use anything else you manually have to mark the recipe with a +. See section 5.7.1 in http://www.gnu.org/software/make/manual/make.html#MAKE-Variable
Cheers, Mårten 2010/12/8 Richard Levitte <[email protected]>: > Hmmm, I'm not aware of the meaning of a '+' at the start of command > lines, never seen it before. I can't see any explanation in the GNU > make manual, so I assume it's another implementation of make that > supports this. > > Please enlighten me. > > Cheers, > Richard > > In message <[email protected]> on > Wed, 8 Dec 2010 13:01:48 +0100, Mårten Wikström > <[email protected]> said: > > marten.wikstrom> Hi! > marten.wikstrom> > marten.wikstrom> With the attached patch I can build openssl in parallel. > Perhaps it is > marten.wikstrom> useful for someone else as well. > marten.wikstrom> > marten.wikstrom> Cheers, > marten.wikstrom> > marten.wikstrom> Mårten > marten.wikstrom> > marten.wikstrom> > marten.wikstrom> > marten.wikstrom> Index: openssl-0.9.8q/Makefile.org > marten.wikstrom> > =================================================================== > marten.wikstrom> --- openssl-0.9.8q.orig/Makefile.org 2010-12-08 > 11:13:10.381185998 +0100 > marten.wikstrom> +++ openssl-0.9.8q/Makefile.org 2010-12-08 > 11:13:59.111185998 +0100 > marten.wikstrom> @@ -326,7 +326,7 @@ > marten.wikstrom> build_libs: build_crypto build_fips build_ssl build_shared > build_engines > marten.wikstrom> > marten.wikstrom> build_crypto: > marten.wikstrom> - if [ -n "$(FIPSCANLIB)" ]; then \ > marten.wikstrom> + +if [ -n "$(FIPSCANLIB)" ]; then \ > marten.wikstrom> EXCL_OBJ='$(AES_ASM_OBJ) $(BN_ASM) $(DES_ENC) $(CPUID_OBJ) > marten.wikstrom> $(SHA1_ASM_OBJ) $(FIPS_EX_OBJ)' ; export EXCL_OBJ ; \ > marten.wikstrom> ARX='$(PERL) $${TOP}/util/arx.pl $(AR)' ; \ > marten.wikstrom> else \ > marten.wikstrom> @@ -334,22 +334,24 @@ > marten.wikstrom> fi ; export ARX ; \ > marten.wikstrom> dir=crypto; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> build_fips: > marten.wikstrom> - @dir=fips; target=all; [ -z "$(FIPSCANLIB)" ] || > $(BUILD_ONE_CMD) > marten.wikstrom> + +...@dir=fips; target=all; [ -z "$(FIPSCANLIB)" ] || > $(BUILD_ONE_CMD) > marten.wikstrom> build_ssl: build_crypto > marten.wikstrom> - @dir=ssl; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> + +...@dir=ssl; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> build_engines: build_crypto > marten.wikstrom> - @dir=engines; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> + +...@dir=engines; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> build_apps: build_libs > marten.wikstrom> - @dir=apps; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> + +...@dir=apps; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> build_tests: build_libs > marten.wikstrom> - @dir=test; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> + +...@dir=test; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> build_tools: build_libs > marten.wikstrom> - @dir=tools; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> + +...@dir=tools; target=all; $(BUILD_ONE_CMD) > marten.wikstrom> > marten.wikstrom> all_testapps: build_libs build_testapps > marten.wikstrom> build_testapps: > marten.wikstrom> @dir=crypto; target=testapps; $(BUILD_ONE_CMD) > marten.wikstrom> > marten.wikstrom> +libcrypto.a: build_crypto > marten.wikstrom> +libssl.a: build_ssl > marten.wikstrom> build_shared: $(SHARED_LIBS) > marten.wikstrom> libcrypto$(SHLIB_EXT): libcrypto.a $(SHARED_FIPS) > marten.wikstrom> @if [ "$(SHLIB_TARGET)" != "" ]; then \ > marten.wikstrom> Index: openssl-0.9.8q/crypto/Makefile > marten.wikstrom> > =================================================================== > marten.wikstrom> --- openssl-0.9.8q.orig/crypto/Makefile 2010-12-08 > 11:25:54.941185997 +0100 > marten.wikstrom> +++ openssl-0.9.8q/crypto/Makefile 2010-12-08 > 11:27:54.031185995 +0100 > marten.wikstrom> @@ -82,17 +82,17 @@ > marten.wikstrom> @if [ -z "$(THIS)" ]; then $(MAKE) -f $(TOP)/Makefile > reflect THIS=$@; fi > marten.wikstrom> > marten.wikstrom> subdirs: > marten.wikstrom> - @target=all; $(RECURSIVE_MAKE) > marten.wikstrom> + +...@target=all; $(RECURSIVE_MAKE) > marten.wikstrom> > marten.wikstrom> files: > marten.wikstrom> $(PERL) $(TOP)/util/files.pl Makefile >> $(TOP)/MINFO > marten.wikstrom> - @target=files; $(RECURSIVE_MAKE) > marten.wikstrom> + +...@target=files; $(RECURSIVE_MAKE) > marten.wikstrom> > marten.wikstrom> links: > marten.wikstrom> @$(PERL) $(TOP)/util/mklink.pl ../include/openssl $(EXHEADER) > marten.wikstrom> @$(PERL) $(TOP)/util/mklink.pl ../test $(TEST) > marten.wikstrom> @$(PERL) $(TOP)/util/mklink.pl ../apps $(APPS) > marten.wikstrom> - @target=links; $(RECURSIVE_MAKE) > marten.wikstrom> + +...@target=links; $(RECURSIVE_MAKE) > marten.wikstrom> > marten.wikstrom> # lib: and $(LIB): are splitted to avoid end-less loop > marten.wikstrom> lib: buildinf.h $(LIB) subdirs > marten.wikstrom> @@ -107,7 +107,7 @@ > marten.wikstrom> fi > marten.wikstrom> > marten.wikstrom> libs: > marten.wikstrom> - @target=lib; $(RECURSIVE_MAKE) > marten.wikstrom> + +...@target=lib; $(RECURSIVE_MAKE) > marten.wikstrom> > marten.wikstrom> install: > marten.wikstrom> @[ -n "$(INSTALLTOP)" ] # should be set by top Makefile... > marten.wikstrom> @@ -116,10 +116,10 @@ > marten.wikstrom> (cp $$i $(INSTALL_PREFIX)$(INSTALLTOP)/include/openssl/$$i; \ > marten.wikstrom> chmod 644 $(INSTALL_PREFIX)$(INSTALLTOP)/include/openssl/$$i > ); \ > marten.wikstrom> done; > marten.wikstrom> - @target=install; $(RECURSIVE_MAKE) > marten.wikstrom> + +...@target=install; $(RECURSIVE_MAKE) > marten.wikstrom> > marten.wikstrom> lint: > marten.wikstrom> - @target=lint; $(RECURSIVE_MAKE) > marten.wikstrom> + +...@target=lint; $(RECURSIVE_MAKE) > marten.wikstrom> > marten.wikstrom> depend: > marten.wikstrom> @[ -z "$(THIS)" -o -f buildinf.h ] || touch buildinf.h # fake > marten.wikstrom> buildinf.h if it does not exist > marten.wikstrom> @@ -130,12 +130,12 @@ > marten.wikstrom> > marten.wikstrom> clean: > marten.wikstrom> rm -f buildinf.h *.s *.o */*.o *.obj lib tags core .pure > .nfs* *.old *.bak fluff > marten.wikstrom> - @target=clean; $(RECURSIVE_MAKE) > marten.wikstrom> + +...@target=clean; $(RECURSIVE_MAKE) > marten.wikstrom> > marten.wikstrom> dclean: > marten.wikstrom> $(PERL) -pe 'if (/^# DO NOT DELETE THIS LINE/) {print; > exit(0);}' > marten.wikstrom> $(MAKEFILE) >Makefile.new > marten.wikstrom> mv -f Makefile.new $(MAKEFILE) > marten.wikstrom> - @target=dclean; $(RECURSIVE_MAKE) > marten.wikstrom> + +...@target=dclean; $(RECURSIVE_MAKE) > marten.wikstrom> > marten.wikstrom> # DO NOT DELETE THIS LINE -- make depend depends on it. > > -- > Richard Levitte [email protected] > http://richard.levitte.org/ > > "Life is a tremendous celebration - and I'm invited!" > -- from a friend's blog, translated from Swedish > ______________________________________________________________________ OpenSSL Project http://www.openssl.org Development Mailing List [email protected] Automated List Manager [email protected]
