[tepl] meson: Fix linking tepl library on Visual Studio

[Sébastien Wilmet <swilmet src gnome org>]

commit 11963709cda7584a05ec1d0d3aab7ec5f514bf0d
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Apr 28 16:16:11 2020 +0800

    meson: Fix linking tepl library on Visual Studio
    
    Some of the linker flags cannot be used for Visual Studio, and we can't
    just link a DLL entirely from a static library on Visual Studio, as the
    linker will optimize things out as it does not see the symbols being
    used.
    
    As a result, instead of linking using just the static library, we call
    extract_all_objects() on the static library in order to link the final
    tepl .so/.dll on all builds.

 tepl/meson.build | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)
---
diff --git a/tepl/meson.build b/tepl/meson.build
index b06eaed..d0ecd5c 100644
--- a/tepl/meson.build
+++ b/tepl/meson.build
@@ -129,13 +129,21 @@ TEPL_STATIC_DEP = declare_dependency(
   dependencies: TEPL_DEPS
 )
 
-symbol_map = meson.current_source_dir() / 'symbol.map'
+tepl_link_args = []
+tepl_link_depends = []
+
+if meson.get_compiler('c').get_argument_syntax() != 'msvc'
+  symbol_map = meson.current_source_dir() / 'symbol.map'
+  tepl_link_args = '-Wl,--version-script,' + symbol_map
+  tepl_link_depends = symbol_map
+endif
 
 tepl_lib = library(
   'tepl-@0@'.format(TEPL_API_VERSION),
-  link_whole: tepl_static_lib,
-  link_args: '-Wl,--version-script,' + symbol_map,
-  link_depends: symbol_map,
+  dependencies: TEPL_DEPS,
+  link_args: tepl_link_args,
+  link_depends: tepl_link_depends,
+  objects: tepl_static_lib.extract_all_objects(),
   version: TEPL_LT_VERSION,
   install: true
 )