Add WITH_PGO to build with Profile-Guided Optimization

PR:		133302
Approved by:	maintainer

1 files changed, 61 insertions, 2 deletions

diff --git a/textproc/libtre/Makefile b/textproc/libtre/Makefile
index 6bef84f73d5..779d1232d97 100644
--- a/textproc/libtre/Makefile
+++ b/textproc/libtre/Makefile
@@ -21,14 +21,15 @@ USE_BZIP2=	yes
 USE_GNOME=	gnomehack gnometarget pkgconfig
 USE_AUTOTOOLS=	libtool:15
 CONFIGURE_ARGS+=	--enable-static
-CONFIGURE_ENV+=	CPPFLAGS="${CPPFLAGS}" LDFLAGS="${LDFLAGS}"
+CONFIGURE_ENV+=	CPPFLAGS="${CPPFLAGS}"
 USE_LDCONFIG=	yes
 
 CPPFLAGS+=	-I${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib
 
 OPTIONS=	NLS "native language support" off \
-		OPTIMIZED_CFLAGS "append optimization flags to CFLAGS" off
+		OPTIMIZED_CFLAGS "append optimization flags to CFLAGS" off \
+		PGO "Enable Profile-Guided Optimization" off
 
 MAN1=	tre_agrep.1
 
@@ -48,12 +49,27 @@ CFLAGS+=	-Wuninitialized -ffast-math -finline-functions \
 		-fforce-mem -fforce-addr -O3
 .endif
 
+.if defined(WITH_PGO)
+CONFIGURE_ENV+=	CFLAGS="${CFLAGS} -fprofile-generate" \
+		LDFLAGS="${LDFLAGS} -fprofile-generate"
+.else
+CONFIGURE_ENV+=	CFLAGS="${CFLAGS}" \
+		LDFLAGS="${LDFLAGS}"
+.endif
+
 post-patch:
 	${MV} ${WRKSRC}/doc/agrep.1.in ${WRKSRC}/doc/tre_agrep.1.in
 	${REINPLACE_CMD} -e 's;agrep\.1;tre_agrep\.1;g' ${WRKSRC}/configure \
 	${WRKSRC}/tre.spec.in ${WRKSRC}/doc/Makefile.in
 	${REINPLACE_CMD} -e 's;agrep;tre_agrep;g' ${WRKSRC}/tests/agrep/*.ok
 
+.if defined(WITH_PGO)
+.if target(pre-build)
+.error Makefile error since pre-build target has already been defined
+.endif
+pre-build: pgo
+.endif
+
 post-install:
 .if !defined(NOPORTDOCS)
 	${MKDIR} ${DOCSDIR}
@@ -65,4 +81,47 @@ post-install:
 regression-test: build
 	@(cd ${BUILD_WRKSRC} ; ${SETENV} ${MAKE_ENV} ${MAKE} check )
 
+.if defined(WITH_PGO)
+pgo: pgo-pre-build pgo-build pgo-run pgo-post-run pgo-clean
+
+pgo-pre-build:
+	@${FIND} ${BUILD_WRKSRC} -type f -name Makefile -exec \
+		${REINPLACE_CMD} -E \
+			-e 's,^((C|LD)FLAGS[[:space:]]*=.*)-fprofile-generate,\1,' \
+			-e 's,^(CFLAGS[[:space:]]*=.*)-fprofile-use,\1,' \
+			-e 's,^((C|LD)FLAGS[[:space:]]*=.*)$$,\1 -fprofile-generate,' \
+			{} \;
+
+pgo-build:
+	@(cd ${BUILD_WRKSRC}; ${SETENV} ${MAKE_ENV} ${MAKE} ${MAKE_FLAGS} ${MAKEFILE} ${_MAKE_JOBS} ${MAKE_ARGS} ${ALL_TARGET})
+
+pgo-run:
+# Check everything to generate profiling information.
+	@-(cd ${BUILD_WRKSRC} ; ${SETENV} ${MAKE_ENV} ${MAKE} check)
+
+pgo-post-run:
+	@${FIND} ${BUILD_WRKSRC} -type f -name Makefile -exec \
+		${REINPLACE_CMD} -E \
+			-e 's,^((C|LD)FLAGS[[:space:]]*=.*)-fprofile-generate,\1,' \
+			-e 's,^(CFLAGS[[:space:]]*=.*)-fprofile-use,\1,' \
+			-e 's,^(CFLAGS[[:space:]]*=.*)$$,\1 -fprofile-use,' \
+			{} \;
+	@${REINPLACE_CMD} -E \
+		-e 's,-fprofile-generate,-fprofile-use,g' \
+		${CONFIGURE_WRKSRC}/config.status \
+		${CONFIGURE_WRKSRC}/libtool
+	@${REINPLACE_CMD} -E \
+		-e 's,-fprofile-generate,,g' \
+		${BUILD_WRKSRC}/tre.pc
+
+pgo-clean:
+# Selectively clean some directories.
+. for dir in gnulib src tests
+	@(cd ${BUILD_WRKSRC}/${dir}; ${SETENV} ${MAKE_ENV} ${MAKE} clean)
+. endfor
+# Only remove some files from lib to preserve profiling information.
+	@${FIND} -E ${BUILD_WRKSRC}/lib -iregex ".*\.(a|la|lai|lo|o|so|so\..*)$$" \
+		-exec ${RM} -f {} \;
+.endif # if defined(WITH_PGO)
+
 .include <bsd.port.post.mk>