build: add more GCC warnings

Adds the set we use in various other GNOME projects.

meson.build

@@ -10,54 +10,99 @@ project('sysprof', ['c', 'cpp'],
 )
 
 cc = meson.get_compiler('c')
-config = configuration_data()
+config_h = configuration_data()
 
-config.set_quoted('PACKAGE_NAME', 'sysprof')
-config.set_quoted('PACKAGE_VERSION', meson.project_version())
-config.set_quoted('PACKAGE_STRING', 'sysprof-' + meson.project_version())
-config.set_quoted('PACKAGE_BUGREPORT', 'https://bugzilla.gnome.org/enter_bug.cgi?product=sysprof')
-config.set('PACKAGE_TARNAME', 'PACKAGE_STRING')
-config.set('PACKAGE', 'PACKAGE_NAME')
-config.set('VERSION', 'PACKAGE_VERSION')
+config_h.set_quoted('PACKAGE_NAME', 'sysprof')
+config_h.set_quoted('PACKAGE_VERSION', meson.project_version())
+config_h.set_quoted('PACKAGE_STRING', 'sysprof-' + meson.project_version())
+config_h.set_quoted('PACKAGE_BUGREPORT', 'https://bugzilla.gnome.org/enter_bug.cgi?product=sysprof')
+config_h.set('PACKAGE_TARNAME', 'PACKAGE_STRING')
+config_h.set('PACKAGE', 'PACKAGE_NAME')
+config_h.set('VERSION', 'PACKAGE_VERSION')
 # PACKAGE_URL
 
 debugdir = get_option('debugdir')
 if debugdir == ''
   debugdir = join_paths(get_option('prefix'), get_option('libdir'), 'debug')
 endif
-config.set_quoted('DEBUGDIR', debugdir)
+config_h.set_quoted('DEBUGDIR', debugdir)
 
-config.set_quoted('GETTEXT_PACKAGE', 'sysprof')
-config.set10('ENABLE_NLS', true)
+config_h.set_quoted('GETTEXT_PACKAGE', 'sysprof')
+config_h.set10('ENABLE_NLS', true)
 
 has_use_clockid = cc.has_member('struct perf_event_attr', 'use_clockid', prefix: '#include <linux/perf_event.h>')
 has_clockid = cc.has_member('struct perf_event_attr', 'clockid', prefix: '#include <linux/perf_event.h>')
 if has_use_clockid and has_clockid
-  config.set10('HAVE_PERF_CLOCKID', true)
+  config_h.set10('HAVE_PERF_CLOCKID', true)
 endif
 
-configure_file(
-  input: 'config.h.meson',
-  output: 'config.h',
-  configuration: config
-)
-
 add_global_arguments([
   '-DHAVE_CONFIG_H',
   '-I' + meson.build_root(), # config.h
 ], language: 'c')
 
-
-c_args_tests = [
-  '-Wno-unused-parameter',
+global_c_args = []
+test_c_args = [
+  '-Wcast-align',
+  '-Wdeclaration-after-statement',
+  '-Wformat-nonliteral',
+  '-Wformat-security',
+  '-Wmissing-include-dirs',
+  '-Wnested-externs',
   '-Wno-missing-field-initializers',
+  '-Wno-sign-compare',
+  '-Wno-unused-parameter',
+  '-Wno-cast-function-type',
+  '-Wpointer-arith',
+  '-Wredundant-decls',
+  '-Wswitch-default',
+  '-Wswitch-enum',
+  '-Wuninitialized',
+  ['-Werror=format-security', '-Werror=format=2' ],
+  '-Werror=empty-body',
+  '-Werror=implicit-function-declaration',
+  '-Werror=incompatible-pointer-types',
+  '-Werror=pointer-arith',
+  '-Werror=init-self',
+  '-Werror=int-conversion',
+  '-Werror=misleading-indentation',
+  '-Werror=missing-include-dirs',
+  '-Werror=overflow',
+  '-Werror=parenthesis',
+  '-Werror=return-type',
+  '-Werror=shadow',
+  '-Werror=strict-prototypes',
+  '-Werror=undef',
 ]
-foreach arg: c_args_tests
-  if cc.has_argument(arg)
-    add_global_arguments(arg, language: 'c')
+if get_option('buildtype') != 'plain'
+  test_c_args += '-fstack-protector-strong'
+endif
+
+foreach arg: test_c_args
+  if cc.has_multi_arguments(arg)
+    global_c_args += arg
   endif
 endforeach
 
+# Detect and set symbol visibility
+hidden_visibility_args = []
+if get_option('default_library') != 'static'
+  if host_machine.system() == 'windows'
+    config_h.set('DLL_EXPORT', true)
+    if cc.get_id() == 'msvc'
+      config_h.set('_SP_EXTERN', '__declspec(dllexport) extern')
+    elif cc.has_argument('-fvisibility=hidden')
+      config_h.set('_SP_EXTERN', '__attribute__((visibility("default"))) __declspec(dllexport) extern')
+      hidden_visibility_args = ['-fvisibility=hidden']
+    endif
+  elif cc.has_argument('-fvisibility=hidden')
+    config_h.set('_SP_EXTERN', '__attribute__((visibility("default"))) extern')
+    hidden_visibility_args = ['-fvisibility=hidden']
+  endif
+endif
+
+add_project_arguments(global_c_args, language: 'c')
+
 global_link_args = []
 test_link_args = [
   '-Wl,-z,relro',
@@ -84,10 +129,7 @@ foreach arg: test_link_args
     global_link_args += arg
   endif
 endforeach
-add_global_link_arguments(
-  global_link_args,
-  language: 'c'
-)
+add_global_link_arguments(global_link_args, language: 'c')
 
 if not cc.links('''
 #include <stdatomic.h>
@@ -107,6 +149,12 @@ if cc.has_argument('-fPIE')
   exe_link_args += '-fpie'
 endif
 
+configure_file(
+          input: 'config.h.meson',
+         output: 'config.h',
+  configuration: config_h
+)
+
 gnome = import('gnome')
 
 subdir('lib')