[master] 7e265ab1d build: Manage libvgz with libtool

[Dridi Boukelmoune]

commit 7e265ab1d5aca44f2e7a03c662c59129d94977e8
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Mon Sep 20 10:56:07 2021 +0200

    build: Manage libvgz with libtool
    
    It's still a static library, but the build is slightly more uniform.

diff --git a/bin/varnishd/Makefile.am b/bin/varnishd/Makefile.am
index 4524dd229..7ca48c873 100644
--- a/bin/varnishd/Makefile.am
+++ b/bin/varnishd/Makefile.am
@@ -177,7 +177,7 @@ varnishd_LDFLAGS = -export-dynamic
 varnishd_LDADD = \
 	$(top_builddir)/lib/libvcc/libvcc.la \
 	$(top_builddir)/lib/libvarnish/libvarnish.la \
-	$(top_builddir)/lib/libvgz/libvgz.a \
+	$(top_builddir)/lib/libvgz/libvgz.la \
 	@JEMALLOC_LDADD@ \
 	${DL_LIBS} ${PTHREAD_LIBS} ${NET_LIBS} ${RT_LIBS} ${LIBM}
 
@@ -208,7 +208,7 @@ esi_parse_fuzzer_CFLAGS = \
 	-DNOT_IN_A_VMOD
 esi_parse_fuzzer_LDADD = \
 	$(top_builddir)/lib/libvarnish/libvarnish.la \
-	$(top_builddir)/lib/libvgz/libvgz.a
+	$(top_builddir)/lib/libvgz/libvgz.la
 
 if ENABLE_OSS_FUZZ
 esi_parse_fuzzer_LDFLAGS = $(LIB_FUZZING_ENGINE)
diff --git a/bin/varnishtest/Makefile.am b/bin/varnishtest/Makefile.am
index 3a79b6fff..4937381d0 100644
--- a/bin/varnishtest/Makefile.am
+++ b/bin/varnishtest/Makefile.am
@@ -54,7 +54,7 @@ varnishtest_SOURCES = \
 varnishtest_LDADD = \
 		$(top_builddir)/lib/libvarnishapi/libvarnishapi.la \
 		$(top_builddir)/lib/libvarnish/libvarnish.la \
-		$(top_builddir)/lib/libvgz/libvgz.a \
+		$(top_builddir)/lib/libvgz/libvgz.la \
 		${PTHREAD_LIBS} ${NET_LIBS} ${LIBM}
 
 varnishtest_CFLAGS = \
diff --git a/lib/libvgz/Makefile.am b/lib/libvgz/Makefile.am
index 5cee560e7..52fd2f0fb 100644
--- a/lib/libvgz/Makefile.am
+++ b/lib/libvgz/Makefile.am
@@ -2,12 +2,12 @@
 
 AM_LDFLAGS  = $(AM_LT_LDFLAGS)
 
-noinst_LIBRARIES = libvgz.a
+noinst_LTLIBRARIES = libvgz.la
 
-libvgz_a_CFLAGS = -D_LARGEFILE64_SOURCE=1 -DZLIB_CONST \
+libvgz_la_CFLAGS = -D_LARGEFILE64_SOURCE=1 -DZLIB_CONST \
 	$(libvgz_extra_cflags)
 
-libvgz_a_SOURCES = \
+libvgz_la_SOURCES = \
 	adler32.c \
 	crc32.c \
 	crc32.h \