[PATCH v2 01/20] configure: Detect libfuse

[Max Reitz <mreitz@redhat.com>]

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 configure   | 34 ++++++++++++++++++++++++++++++++++
 meson.build |  6 ++++++
 2 files changed, 40 insertions(+)

diff --git a/configure b/configure
index ce27eafb0a..21c31e4694 100755
--- a/configure
+++ b/configure
@@ -538,6 +538,7 @@ meson=""
 ninja=""
 skip_meson=no
 gettext=""
+fuse=""
 
 bogus_os="no"
 malloc_trim=""
@@ -1621,6 +1622,10 @@ for opt do
   ;;
   --disable-libdaxctl) libdaxctl=no
   ;;
+  --enable-fuse) fuse=yes
+  ;;
+  --disable-fuse) fuse=no
+  ;;
   *)
       echo "ERROR: unknown option $opt"
       echo "Try '$0 --help' for more information"
@@ -1945,6 +1950,7 @@ disabled with --disable-FEATURE, default is enabled if available:
   xkbcommon       xkbcommon support
   rng-none        dummy RNG, avoid using /dev/(u)random and getrandom()
   libdaxctl       libdaxctl support
+  fuse            fuse block device export
 
 NOTE: The object files are built at the place where configure is launched
 EOF
@@ -6206,6 +6212,28 @@ but not implemented on your system"
     fi
 fi
 
+##########################################
+# FUSE support
+
+if test "$fuse" != "no"; then
+  cat > $TMPC <<EOF
+#define FUSE_USE_VERSION 31
+#include <fuse.h>
+#include <fuse_lowlevel.h>
+int main(void) { return 0; }
+EOF
+  fuse_cflags=$(pkg-config --cflags fuse3)
+  fuse_libs=$(pkg-config --libs fuse3)
+  if compile_prog "$fuse_cflags" "$fuse_libs"; then
+    fuse=yes
+  else
+    if test "$fuse" = "yes"; then
+      feature_not_found "fuse"
+    fi
+    fuse=no
+  fi
+fi
+
 ##########################################
 # End of CC checks
 # After here, no more $cc or $ld runs
@@ -7393,6 +7421,12 @@ if test "$secret_keyring" = "yes" ; then
   echo "CONFIG_SECRET_KEYRING=y" >> $config_host_mak
 fi
 
+if test "$fuse" = "yes"; then
+  echo "CONFIG_FUSE=y" >> $config_host_mak
+  echo "FUSE_CFLAGS=$fuse_cflags" >> $config_host_mak
+  echo "FUSE_LIBS=$fuse_libs" >> $config_host_mak
+fi
+
 if test "$tcg_interpreter" = "yes"; then
   QEMU_INCLUDES="-iquote ${source_path}/tcg/tci $QEMU_INCLUDES"
 elif test "$ARCH" = "sparc64" ; then
diff --git a/meson.build b/meson.build
index 86e1cca0ad..85addd8562 100644
--- a/meson.build
+++ b/meson.build
@@ -436,6 +436,11 @@ if 'CONFIG_TASN1' in config_host
 endif
 keyutils = dependency('libkeyutils', required: false,
                       method: 'pkg-config', static: enable_static)
+libfuse = not_found
+if 'CONFIG_FUSE' in config_host
+  libfuse = declare_dependency(compile_args: config_host['FUSE_CFLAGS'].split(),
+                               link_args: config_host['FUSE_LIBS'].split())
+endif
 
 has_gettid = cc.has_function('gettid')
 
@@ -1531,6 +1536,7 @@ endif
 summary_info += {'thread sanitizer':  config_host.has_key('CONFIG_TSAN')}
 summary_info += {'rng-none':          config_host.has_key('CONFIG_RNG_NONE')}
 summary_info += {'Linux keyring':     config_host.has_key('CONFIG_SECRET_KEYRING')}
+summary_info += {'fuse exports':      config_host.has_key('CONFIG_FUSE')}
 summary(summary_info, bool_yn: true)
 
 if not supported_cpus.contains(cpu)
-- 
2.26.2