[WIP] [PATCH v4 12/12] erofs-utils: fuse: fix up configure.ac / Makefile.am

[Gao Xiang]

Signed-off-by: Gao Xiang <hsiangkao at aol.com>
---
 Makefile.am      |  6 +++++-
 configure.ac     | 19 +++++++++++++++++++
 fuse/Makefile.am | 10 +++-------
 3 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 24f4a7b3d5ad..b804aa90efa9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,4 +3,8 @@
 
 ACLOCAL_AMFLAGS = -I m4
 
-SUBDIRS = man lib mkfs fuse
+SUBDIRS = man lib mkfs
+if ENABLE_FUSE
+SUBDIRS += fuse
+endif
+
diff --git a/configure.ac b/configure.ac
index e6d2e5fd3702..80d38d0ef952 100644
--- a/configure.ac
+++ b/configure.ac
@@ -63,6 +63,10 @@ AC_ARG_ENABLE(lz4,
    [AS_HELP_STRING([--disable-lz4], [disable LZ4 compression support @<:@default=enabled@:>@])],
    [enable_lz4="$enableval"], [enable_lz4="yes"])
 
+AC_ARG_ENABLE(fuse,
+   [AS_HELP_STRING([--disable-fuse], [disable erofsfuse @<:@default=enabled@:>@])],
+   [enable_fuse="$enableval"], [enable_fuse="yes"])
+
 AC_ARG_WITH(uuid,
    [AS_HELP_STRING([--without-uuid],
       [Ignore presence of libuuid and disable uuid support @<:@default=enabled@:>@])])
@@ -183,6 +187,20 @@ AS_IF([test "x$with_selinux" != "xno"], [
   LIBS="${saved_LIBS}"
   CPPFLAGS="${saved_CPPFLAGS}"], [have_selinux="no"])
 
+# Configure fuse
+AS_IF([test "x$enable_fuse" != "xno"], [
+  PKG_CHECK_MODULES([libfuse], [fuse >= 2.6.0])
+  # Paranoia: don't trust the result reported by pkgconfig before trying out
+  saved_LIBS="$LIBS"
+  saved_CPPFLAGS=${CPPFLAGS}
+  CPPFLAGS="${libfuse_CFLAGS} ${CPPFLAGS}"
+  LIBS="${libfuse_LIBS} $LIBS"
+  AC_CHECK_LIB(fuse, fuse_main, [
+    have_fuse="yes" ], [
+    AC_MSG_ERROR([libfuse >= 2.6.0 doesn't work properly])])
+  LIBS="${saved_LIBS}"
+  CPPFLAGS="${saved_CPPFLAGS}"], [have_fuse="no"])
+
 # Configure lz4
 test -z $LZ4_LIBS && LZ4_LIBS='-llz4'
 
@@ -218,6 +236,7 @@ fi
 # Set up needed symbols, conditionals and compiler/linker flags
 AM_CONDITIONAL([ENABLE_LZ4], [test "x${have_lz4}" = "xyes"])
 AM_CONDITIONAL([ENABLE_LZ4HC], [test "x${have_lz4hc}" = "xyes"])
+AM_CONDITIONAL([ENABLE_FUSE], [test "x${have_fuse}" = "xyes"])
 
 if test "x$have_uuid" = "xyes"; then
   AC_DEFINE([HAVE_LIBUUID], 1, [Define to 1 if libuuid is found])
diff --git a/fuse/Makefile.am b/fuse/Makefile.am
index 4ed4215b9936..6636ee1aec69 100644
--- a/fuse/Makefile.am
+++ b/fuse/Makefile.am
@@ -4,11 +4,7 @@
 AUTOMAKE_OPTIONS = foreign
 bin_PROGRAMS     = erofsfuse
 erofsfuse_SOURCES = dir.c main.c
-erofsfuse_CFLAGS = -Wall -Werror \
-                   -I$(top_srcdir)/include \
-                   $(shell pkg-config fuse --cflags) \
-                   -DFUSE_USE_VERSION=26 \
-                   -std=gnu99
-LDFLAGS += $(shell pkg-config fuse --libs)
-erofsfuse_LDADD = $(top_builddir)/lib/liberofs.la -ldl ${LZ4_LIBS}
+erofsfuse_CFLAGS = -Wall -Werror -I$(top_srcdir)/include
+erofsfuse_CFLAGS += -DFUSE_USE_VERSION=26 ${libfuse_CFLAGS}
+erofsfuse_LDADD = $(top_builddir)/lib/liberofs.la ${libfuse_LIBS} ${LZ4_LIBS}
 
-- 
2.24.0