meson: fix symbol export with MSVC and use -fvisibility elsewhere

Use newly-added ORC_API decorators to export symbols explicitly.

Get rid of orc.map file and the ORC_EXPORT stuff that never did
anything anyway (define was unused).

10 files changed, 34 insertions, 52 deletions

diff --git a/Makefile.am b/Makefile.am
index bc0db2d..ede9987 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -16,7 +16,7 @@ DIST_SUBDIRS = orc orc-test tools examples testsuite doc
 
 EXTRA_DIST = COPYING RELEASE autogen.sh gtk-doc.make orc.m4 \
 	$(shell find "$(top_srcdir)" -type f -name meson.build ! -path "$(top_srcdir)/orc-0.4.*" ) \
-	meson_options.txt orc/orc.map
+	meson_options.txt
 
 DISTCHECK_CONFIGURE_FLAGS=--enable-gtk-doc
 
diff --git a/configure.ac b/configure.ac
index b630d5c..87ff117 100644
--- a/configure.ac
+++ b/configure.ac
@@ -230,8 +230,6 @@ AC_ARG_ENABLE(Bsymbolic,
                            enable_Bsymbolic=no)
                LDFLAGS="${SAVED_LDFLAGS}" LIBS="${SAVED_LIBS}"])
 
-AC_DEFINE(ORC_EXPORTS, 1, [Defined for compiling internal code])
-
 ORC_CFLAGS="$ORC_CFLAGS \$(ERROR_CFLAGS) -I\$(top_srcdir) -D_GNU_SOURCE"
 AC_SUBST(ERROR_CFLAGS)
 AC_SUBST(ORC_CFLAGS)
diff --git a/meson.build b/meson.build
index af4f523..e2c6948 100644
--- a/meson.build
+++ b/meson.build
@@ -19,6 +19,9 @@ orc_inc = include_directories('.')
 
 cc = meson.get_compiler('c')
 
+cdata = configuration_data()      # config.h
+pc_conf = configuration_data()    # orc.pc
+
 # -Bsymbolic-functions
 if meson.version().version_compare('>= 0.46.0')
   if cc.has_link_argument('-Wl,-Bsymbolic-functions')
@@ -26,10 +29,17 @@ if meson.version().version_compare('>= 0.46.0')
   endif
 endif
 
-cdata = configuration_data()      # config.h
-pc_conf = configuration_data()    # orc.pc
-
-cdata.set('ORC_EXPORTS', true)
+# Symbol visibility
+if cc.get_id() == 'msvc'
+  export_define = '__declspec(dllexport) extern'
+elif cc.has_argument('-fvisibility=hidden')
+  add_project_arguments('-fvisibility=hidden', language: 'c')
+  export_define = 'extern __attribute__ ((visibility ("default")))'
+else
+  export_define = 'extern'
+endif
+# Passing this through the command line would be too messy
+cdata.set('ORC_API_EXPORT', export_define)
 
 all_backends = ['sse', 'mmx', 'altivec', 'neon', 'mips', 'c64x'] # 'arm'
 
diff --git a/orc-test/meson.build b/orc-test/meson.build
index 994f391..d0471e0 100644
--- a/orc-test/meson.build
+++ b/orc-test/meson.build
@@ -3,27 +3,19 @@ orc_test_sources = ['orctest.c', 'orcarray.c', 'orcrandom.c', 'orcprofile.c']
 
 install_headers(orc_test_headers, subdir : 'orc-' + orc_api + '/orc-test')
 
-if cc.get_id() != 'msvc'
-  link_args = ['-Wl,--version-script,' + meson.current_source_dir() + '/orc-test.map']
-else
-  link_args = []
-endif
-
 orc_test_shr = shared_library ('orc-test-' + orc_api,
   orc_test_sources,
   version : libversion,
   soversion : soversion,
   include_directories : orc_inc,
-  c_args : [ orc_c_args , '-DORC_ENABLE_UNSTABLE_API' ],
+  c_args : orc_c_args + ['-DBUILDING_ORC_TEST'],
   dependencies : [libm, orc_dep],
-  link_args : link_args,
-  link_depends : 'orc-test.map',
   install : true)
 
 orc_test_sta = static_library ('orc-test-' + orc_api,
   objects : orc_test_shr.extract_all_objects(),
   include_directories : orc_inc,
-  c_args : [ orc_c_args , '-DORC_ENABLE_UNSTABLE_API' ],
+  c_args : orc_c_args + ['-DBUILDING_ORC_TEST'],
   dependencies : [libm, orc_dep],
   install : true)
 
diff --git a/orc-test/orc-test.map b/orc-test/orc-test.map
deleted file mode 100644
index 47f2b25..0000000
--- a/orc-test/orc-test.map
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-global:
-    orc_*;
-local:
-    *;
-};
diff --git a/orc-test/orctest.h b/orc-test/orctest.h
index eddb0c7..6a86835 100644
--- a/orc-test/orctest.h
+++ b/orc-test/orctest.h
@@ -7,8 +7,10 @@
 
 ORC_BEGIN_DECLS
 
-#ifndef ORC_TEST_API
-#define ORC_TEST_API extern
+#ifdef BUILDING_ORC_TEST
+#define ORC_TEST_API ORC_API_EXPORT /* defined in config.h */
+#else
+#define ORC_TEST_API ORC_API_IMPORT
 #endif
 
 typedef enum {
diff --git a/orc/meson.build b/orc/meson.build
index 138c4d4..541603f 100644
--- a/orc/meson.build
+++ b/orc/meson.build
@@ -101,28 +101,19 @@ orc_c_args = ['-DORC_ENABLE_UNSTABLE_API', '-D_GNU_SOURCE']
 
 orc_dependencies = [libm, librt, liblog]
 
-# FIXME: Use gcc visibility attributes in ORC_EXPORT
-if cc.get_id() != 'msvc'
-  link_args = ['-Wl,--version-script,' + meson.current_source_dir() + '/orc.map']
-else
-  link_args = []
-endif
-
 orc_shr = shared_library ('orc-' + orc_api,
   orc_sources,
   version : libversion,
   soversion : soversion,
   include_directories : orc_inc,
-  c_args : orc_c_args,
+  c_args : orc_c_args + ['-DBUILDING_ORC'],
   dependencies : orc_dependencies,
-  link_args : link_args,
-  link_depends : 'orc.map',
   install : true)
 
 orc_sta = static_library ('orc-' + orc_api,
   objects: orc_shr.extract_all_objects(),
   include_directories : orc_inc,
-  c_args : orc_c_args,
+  c_args : orc_c_args + ['-DBUILDING_ORC'],
   install : true)
 
 if get_option('default_library') == 'static'
diff --git a/orc/orc.h b/orc/orc.h
index a3e4039..38de15b 100644
--- a/orc/orc.h
+++ b/orc/orc.h
@@ -2,10 +2,6 @@
 #ifndef _ORC_ORC_H_
 #define _ORC_ORC_H_
 
-#ifndef ORC_API
-#define ORC_API extern
-#endif
-
 #include <orc/orcutils.h>
 #include <orc/orcprogram.h>
 #include <orc/orcdebug.h>
diff --git a/orc/orc.map b/orc/orc.map
deleted file mode 100644
index 47f2b25..0000000
--- a/orc/orc.map
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-global:
-    orc_*;
-local:
-    *;
-};
diff --git a/orc/orcutils.h b/orc/orcutils.h
index a56f520..a15c75b 100644
--- a/orc/orcutils.h
+++ b/orc/orcutils.h
@@ -200,14 +200,19 @@ typedef unsigned int orc_bool;
 #define ORC_END_DECLS
 #endif
 
-#ifdef _MSC_VER
-#ifdef ORC_EXPORTS
-#define ORC_EXPORT __declspec(dllexport) extern
+/* FIXME: unused, remove */
+#define ORC_EXPORT
+
+#if defined(_MSC_VER) || defined(_WIN32)
+#define ORC_API_IMPORT __declspec(dllimport) extern
 #else
-#define ORC_EXPORT __declspec(dllimport) extern
+#define ORC_API_IMPORT extern
 #endif
-#else /* not _MSC_VER */
-#define ORC_EXPORT extern
+
+#ifdef BUILDING_ORC
+#define ORC_API ORC_API_EXPORT /* defined in config.h */
+#else
+#define ORC_API ORC_API_IMPORT
 #endif
 
 ORC_BEGIN_DECLS