[libgxps] meson: improve getting the supported flags

[Ignacio Casal Quinteiro <icq src gnome org>]

commit f1b75946bd8145bf188980d70e475126e0284a0e
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Tue Mar 27 22:36:54 2018 +0200

    meson: improve getting the supported flags

 meson.build |   38 ++++++--------------------------------
 1 files changed, 6 insertions(+), 32 deletions(-)
---
diff --git a/meson.build b/meson.build
index 1c7c2ef..757afe2 100644
--- a/meson.build
+++ b/meson.build
@@ -40,30 +40,10 @@ host_system = host_machine.system()
 
 # Compiler flags
 if cc.get_id() == 'msvc'
-  # Make MSVC more pedantic, this is a recommended pragma list
-  # from _Win32_Programming_ by Rector and Newcomer.  Taken from
-  # glib's msvc_recommended_pragmas.h--please see that file for
-  # the meaning of the warning codes used here
-  test_cflags = [
-    '-we4002', # too many actual parameters for macro
-    '-we4003', # not enough actual parameters for macro
-    '-w14010', # single-line comment contains line-continuation character
-    '-we4013', # 'function' undefined; assuming extern returning int
-    '-w14016', # no function return type; using int as default
-    '-we4020', # too many actual parameters
-    '-we4021', # too few actual parameters
-    '-we4027', # function declared without formal parameter list
-    '-we4029', # declared formal parameter list different from definition
-    '-we4033', # 'function' must return a value
-    '-we4035', # 'function' : no return value
-    '-we4045', # array bounds overflow
-    '-we4047', # different levels of indirection
-    '-we4049', # terminating line number emission
-    '-we4053', # an expression of type void was used as an operand
-    '-we4071', # no function prototype given
-    '-we4819', # the file contains a character that cannot be represented in the current code page
-  ]
-elif cc.get_id() == 'gcc' or cc.get_id() == 'clang'
+  # Compiler options taken from msvc_recommended_pragmas.h
+  # in GLib, based on _Win32_Programming_ by Rector and Newcomer
+  common_flags = ['-FImsvc_recommended_pragmas.h']
+else
   test_cflags = [
     '-Wpointer-arith',
     '-Wmissing-declarations',
@@ -97,15 +77,9 @@ elif cc.get_id() == 'gcc' or cc.get_id() == 'clang'
     '-fno-strict-aliasing',
     '-Wno-int-conversion',
   ]
-else
-  test_cflags = []
+
+  common_flags = cc.get_supported_arguments(test_cflags)
 endif
-common_flags = []
-foreach cflag: test_cflags
-  if cc.has_argument(cflag)
-    common_flags += [ cflag ]
-  endif
-endforeach
 
 extra_args= []