deps: add Makefile to generate opensslconf.h

This Makefile executes ../openssl/Configure {target} and copy
generated `../openssl/crypto/opensslconf.h` into
`archs/{target}/opensslconf.h`. with the target list that is defined
in ARCS. Several files are backuped and cleaned so as not
to change the files in `../openssl`.

This also applys three fixes as below by using sed script so as to
meet iojs build requirements.

- VC-WIN32 and VC-WIN64A
OPENSSL_NO_DYNAMIC_ENGINE is needed for building static
library. OPENSSL_NO_CAPIENG is needed to avoid build errors on
Win. See the comments in `deps/openssl/openssl/engines/e_capi.c` for
detail.

- linux-x32
This fix was made by comparing define values of opensslconf.h which
was generated `Configure linux-x32' in openssl-1.0.2a

- darwin64-x86_64-cc
The current openssl relase does not use RC4 asm since it explicitly
specified as `$asm=~s/rc4\-[^:]+//;` in
https://github.com/openssl/openssl/blob/OpenSSL_1_0_1-stable/Configure#L584
But iojs has used RC4 asm on MacOS for long time. Fix type of RC4_INT
into `unsinged int` in opensslconf.h of darwin64-x86_64-cc to work on
the RC4 asm.

deps/openssl/config/Makefile

@@ -0,0 +1,64 @@
+SED     = sed
+PERL    = perl
+CONFIGURE = ./Configure
+CONFIGOPT = no-shared no-symlinks
+ARCS = BSD-x86 BSD-x86_64 VC-WIN32 VC-WIN64A darwin64-x86_64-cc darwin-i386-cc linux-armv4 linux-elf linux-x86_64 solaris-x86-gcc solaris64-x86_64-gcc
+
+OPENSSLDIR =
+BACKUP_FILES = ../openssl/Makefile ../openssl/Makefile.bak ../openssl/crypto/opensslconf.h
+BACKUP_EXT = iojsbackup
+
+PHONY = all clean backup restore
+.PHONY: $(PHONY)
+
+all: backup $(ARCS) linux-x32 cleanconf fixdarwin64 fixwin restore
+
+$(ARCS):
+	cd ../openssl; $(PERL) $(CONFIGURE) $(CONFIGOPT) $@ > /dev/null
+	$(SED) -e 's/#define OPENSSL_CPUID_OBJ//' ../openssl/crypto/opensslconf.h > ./archs/$@/opensslconf.h
+
+# linux-x32 was made by comparing define values of opensslconf.h which
+# was generated `Configure linux-x32' in openssl-1.0.2a
+linux-x32:
+	cd ../openssl; $(PERL) $(CONFIGURE) $(CONFIGOPT) linux-x86_64 > /dev/null;
+	$(SED) -e 's/#define OPENSSL_CPUID_OBJ//' -e 's/#define RC4_CHUNK unsigned long/#define RC4_CHUNK unsigned long long/' -e 's/#define SIXTY_FOUR_BIT_LONG/#undef SIXTY_FOUR_BIT_LONG/' -e 's/#undef SIXTY_FOUR_BI/#define SIXTY_FOUR_BIT/' ../openssl/crypto/opensslconf.h > ./archs/$@/opensslconf.h
+
+# The current openssl relase does not use RC4 asm since it explicitly
+# specified as `$asm=~s/rc4\-[^:]+//;` in
+# https://github.com/openssl/openssl/blob/OpenSSL_1_0_1-stable/Configure#L584
+# But iojs has used RC4 asm on MacOS for long time. Fix type of RC4_INT
+# into `unsinged int` in opensslconf.h of darwin64-x86_64-cc to work on
+# the RC4 asm.
+fixdarwin64:
+	$(SED) -i -e 's/#define RC4_INT unsigned char/\/* Fixed by Makefile *\/\n#define RC4_INT unsigned int\n\/* end of Fix *\//' ./archs/darwin64-x86_64-cc/opensslconf.h
+
+
+# OPENSSL_NO_DYNAMIC_ENGINE is needed for building static
+# library. OPENSSL_NO_CAPIENG is needed to avoid build errors on
+# Win. See the comments in `deps/openssl/openssl/engines/e_capi.c` for
+# detail.
+fixwin:
+	$(SED) -i -e 's/#ifndef OPENSSL_DOING_MAKEDEPEND/#ifndef OPENSSL_DOING_MAKEDEPEND\n\n\/* Fixed by Makefile *\/\n#ifndef OPENSSL_NO_DYNAMIC_ENGINE\n# define OPENSSL_NO_DYNAMIC_ENGINE\n#endif\n#ifndef OPENSSL_NO_CAPIENG\n# define OPENSSL_NO_CAPIENG\n#endif\n\/* end of Fix *\//' ./archs/VC-WIN32/opensslconf.h ./archs/VC-WIN64A/opensslconf.h
+
+
+backup:
+	@for f in $(BACKUP_FILES); do \
+	    mv $$f $$f.$(BACKUP_EXT); \
+	done
+
+restore:
+	@for f in $(BACKUP_FILES); do \
+	    mv $$f.$(BACKUP_EXT) $$f ; \
+	done
+
+cleanconf:
+	@rm ../openssl/crypto/opensslconf.h
+	@rm ../openssl/Makefile
+	@rm ../openssl/apps/CA.pl.bak
+	@rm ../openssl/crypto/buildinf.h
+	@rm ../openssl/crypto/opensslconf.h.bak
+	@rm ../openssl/ms/version32.rc
+	@rm ../openssl/tools/c_rehash.bak
+
+clean:
+	find archs -name opensslconf.h -exec rm "{}" \;