[PATCH v2] build: support building static library liberofsfuse

[ComixHe]

add new option '--enable-static-fuse' so that we
could import erofsfuse as a static library directly
into other projects

Signed-off-by: ComixHe <heyuming at deepin.org>
---
 configure.ac     | 7 +++++++
 fuse/Makefile.am | 9 +++++++++
 2 files changed, 16 insertions(+)

diff --git a/configure.ac b/configure.ac
index 1989bca..f756139 100644
--- a/configure.ac
+++ b/configure.ac
@@ -147,6 +147,12 @@ AC_ARG_ENABLE(fuse,
    [AS_HELP_STRING([--enable-fuse], [enable erofsfuse @<:@default=no@:>@])],
    [enable_fuse="$enableval"], [enable_fuse="no"])
 
+AC_ARG_ENABLE([static-fuse],
+    [AS_HELP_STRING([--enable-static-fuse],
+                    [build erofsfuse as a static library @<:@default=no@:>@])],
+    [enable_static_fuse="$enableval"],
+    [enable_static_fuse="no"])
+
 AC_ARG_WITH(uuid,
    [AS_HELP_STRING([--without-uuid],
       [Ignore presence of libuuid and disable uuid support @<:@default=enabled@:>@])])
@@ -525,6 +531,7 @@ AM_CONDITIONAL([ENABLE_FUSE], [test "x${have_fuse}" = "xyes"])
 AM_CONDITIONAL([ENABLE_LIBLZMA], [test "x${have_liblzma}" = "xyes"])
 AM_CONDITIONAL([ENABLE_LIBDEFLATE], [test "x${have_libdeflate}" = "xyes"])
 AM_CONDITIONAL([ENABLE_LIBZSTD], [test "x${have_libzstd}" = "xyes"])
+AM_CONDITIONAL([ENABLE_STATIC_FUSE], [test "x${enable_static_fuse}" = "xyes"])
 
 if test "x$have_uuid" = "xyes"; then
   AC_DEFINE([HAVE_LIBUUID], 1, [Define to 1 if libuuid is found])
diff --git a/fuse/Makefile.am b/fuse/Makefile.am
index 7eae5f6..c5c5696 100644
--- a/fuse/Makefile.am
+++ b/fuse/Makefile.am
@@ -8,3 +8,12 @@ erofsfuse_CFLAGS = -Wall -I$(top_srcdir)/include
 erofsfuse_CFLAGS += ${libfuse2_CFLAGS} ${libfuse3_CFLAGS} ${libselinux_CFLAGS}
 erofsfuse_LDADD = $(top_builddir)/lib/liberofs.la ${libfuse2_LIBS} ${libfuse3_LIBS} ${liblz4_LIBS} \
 	${libselinux_LIBS} ${liblzma_LIBS} ${zlib_LIBS} ${libdeflate_LIBS} ${libzstd_LIBS}
+
+if ENABLE_STATIC_FUSE
+lib_LIBRARIES = liberofsfuse.a
+liberofsfuse_a_SOURCES = main.c
+liberofsfuse_a_CFLAGS  = -Wall -I$(top_srcdir)/include
+liberofsfuse_a_CFLAGS += -Dmain=erofsfuse_main ${libfuse2_CFLAGS} ${libfuse3_CFLAGS} ${libselinux_CFLAGS}
+liberofsfuse_la_LIBADD  = $(top_builddir)/lib/liberofs.la ${libfuse2_LIBS} ${libfuse3_LIBS} ${liblz4_LIBS} \
+	${libselinux_LIBS} ${liblzma_LIBS} ${zlib_LIBS} ${libdeflate_LIBS} ${libzstd_LIBS}
+endif
-- 
2.45.2