crypto/openssl: apply polish to new vendor import process

This change does the following 2 things:
- Makes the build more repeatable by isolating the environment. This
  prevents bmake from leaking variables into gmake and makes the overall
  process a bit more robust.
- Add debug printouts to make the process more straightforward to the
  reader and whoever is executing doing the current vendor import.

MFC after: 1 month
Differential Revision:	https://reviews.freebsd.org/D52420

(cherry picked from commit d18058b7b850c78f2ca1be746ab411c0bed5acc9)

crypto/openssl/BSDmakefile

@@ -12,8 +12,10 @@ LCRYPTO_SRC=	${SRCTOP}/crypto/openssl
 LCRYPTO_DOC=	${LCRYPTO_SRC}/doc
 
 CAT?=		/bin/cat
+GMAKE?=		gmake
 MV?=		/bin/mv
 PERL?=		perl
+SETENVI=	/usr/bin/env -i
 
 BN_CONF_H=		include/crypto/bn_conf.h
 BN_CONF_H_ORIG=		${BN_CONF_H}.orig
@@ -23,8 +25,11 @@ CONFIGURATION_H_ORIG=	${CONFIGURATION_H}.orig
 .PHONY: configure patch all
 .ORDER: configure patch all
 
+LOCALBASE=	/usr/local
+WRK_ENV=	PATH=${LOCALBASE}/bin:/bin:/usr/bin
+
 configure:
-	@cd ${.CURDIR} && \
+	@(cd ${.CURDIR} && ${SETENVI} \
 	    ${PERL} ./Configure \
 	    disable-aria \
 	    disable-egd \
@@ -37,34 +42,45 @@ configure:
 	    enable-ktls \
 	    enable-sctp \
 	    --openssldir=etc \
-	    --prefix=/usr
-	@cd ${.CURDIR} && gmake configdata.pm
-	@cd ${LCRYPTO_SRC} && ${PERL} \
-	    ${LCRYPTO_SRC}/freebsd/dump_version_from_configdata.pl > \
-	    ${SRCTOP}/secure/lib/libcrypto/Makefile.version
+	    --prefix=/usr)
+	@echo "Building configdata.pm for later use."
+	@(cd ${.CURDIR} && \
+	    ${SETENVI} ${WRK_ENV} ${GMAKE} -j ${.MAKE.JOBS} configdata.pm)
+
+	@echo "Populating Makefile.version with release information"
+	@(cd ${LCRYPTO_SRC} && ${SETENVI} ${WRK_ENV} ${PERL} \
+	     ${LCRYPTO_SRC}/freebsd/dump_version_from_configdata.pl > \
+	     ${SRCTOP}/secure/lib/libcrypto/Makefile.version)
 
 all: patch
-	# Passing `-j ${.MAKE.JOBS}` doesn't work here for some reason.
-	@cd ${.CURDIR} && gmake build_all_generated
+	@echo "==> Building generated files (headers, manpages, etc)"
+	@(cd ${.CURDIR} && \
+	     ${SETENVI} ${WRK_ENV} ${GMAKE} -j ${.MAKE.JOBS} build_all_generated)
 
-	# Clean the pkgconfig files:
-	# 1. Fix --prefix (not sure why configure --prefix isn't honored properly).
+	# 1. Fix --prefix.
+	#    a. Not sure why --prefix isn't honored properly, even though it's
+	#       passed to Configure; the files might be getting rebuilt
+	#       post-Configure, somehow.
 	# 2. Remove duplicate path in CFLAGS.
 	# 3. Remove duplicate path in includedir(s).
+	@echo "==> Fixing pkgconfig files"
 	@find . -name \*.pc -print -exec sed -i '' -E \
 	    -e 's,^prefix=.+,prefix=/usr,' \
 	    -e 's,[[:space:]]+(\-I)?\$\{prefix\}/\./include[[:space:]]*,,g' \
 	    {} +
 
-	@cd ${SRCTOP}/secure/lib/libcrypto && \
-	    ${MAKE} cleanasm && \
-	    ${MAKE} buildasm
+	@echo "==> Cleaning / rebuilding ASM"
+	@(cd ${SRCTOP}/secure/lib/libcrypto && \
+	     ${SETENVI} ${WRK_ENV} ${MAKE} cleanasm && \
+	     ${SETENVI} ${WRK_ENV} ${MAKE} buildasm)
 
+	@echo "==> Syncing manpages (section 1)"
 	@rsync -a --delete \
 	    --exclude 'Makefile*' --exclude '*.1' \
 	    ${LCRYPTO_DOC}/man/ \
 	    ${SRCTOP}/secure/lib/libcrypto/man
 
+	@echo "==> Syncing manpages (sections {3,5,7})"
 	@rsync -a --delete \
 	    --exclude 'Makefile*' --exclude '*.[357]' \
 	    ${LCRYPTO_DOC}/man/man1/ \
@@ -75,25 +91,26 @@ all: patch
 # depending on the host architecture.
 patch: configure
 	# Spam arch-specific overrides to config files.
+	@echo "==> Patching headers"
+	@(cd ${.CURDIR} && ${SETENVI} ${WRK_ENV} ${GMAKE} ${BN_CONF_H} && \
+	 ${MV} ${BN_CONF_H} ${BN_CONF_H_ORIG} && \
+	 ${CAT} ${BN_CONF_H}.orig \
+	     ${LCRYPTO_SRC}/freebsd/${BN_CONF_H} >> \
+	     ${BN_CONF_H})
 
-	@cd ${.CURDIR} && gmake ${BN_CONF_H} && \
-	${MV} ${BN_CONF_H} ${BN_CONF_H_ORIG} && \
-	${CAT} ${BN_CONF_H}.orig \
-	    ${LCRYPTO_SRC}/freebsd/${BN_CONF_H} >> \
-	    ${BN_CONF_H}
-
-	@cd ${.CURDIR} && \
-	 ${MV} ${CONFIGURATION_H} ${CONFIGURATION_H_ORIG} && \
-	 ${CAT} ${CONFIGURATION_H_ORIG} \
-	    ${LCRYPTO_SRC}/freebsd/${CONFIGURATION_H} >> \
-	    ${CONFIGURATION_H}
+	@(cd ${.CURDIR} && \
+	  ${MV} ${CONFIGURATION_H} ${CONFIGURATION_H_ORIG} && \
+	  ${CAT} ${CONFIGURATION_H_ORIG} \
+	     ${LCRYPTO_SRC}/freebsd/${CONFIGURATION_H} >> \
+	     ${CONFIGURATION_H})
 
 
 clean: .PHONY
-	@cd ${.CURDIR} && rm -f ${BN_CONF_H_ORIG} ${CONFIGURATION_H_ORIG}
+	@(cd ${.CURDIR} && rm -f ${BN_CONF_H_ORIG} ${CONFIGURATION_H_ORIG})
 
-	@cd ${SRCTOP}/secure/lib/libcrypto && ${MAKE} cleanasm
+	@(cd ${SRCTOP}/secure/lib/libcrypto && \
+	    ${SETENVI} ${WRK_ENV} ${MAKE} cleanasm)
 
-	-@cd ${.CURDIR} && gmake ${.TARGET}
+	-@(cd ${.CURDIR} && ${GMAKE} ${.TARGET})
 
 .include <sys.mk>