1 files changed, 196 insertions, 0 deletions
diff --git a/meson/meson.build b/meson/meson.build
new file mode 100644
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+++ b/meson/meson.build
@@ -0,0 +1,196 @@
+# General code to enable approximately all warnings.
+#
+# This is trivial for clang and MSVC, but GCC does not have such an option, and
+# has several esoteric warnings, so we need to enable everything we want
+# explicitly.  We enable everything that does not require a value argument,
+# except for warnings that are only relevant for very old languages (earlier
+# than C99 or C++11) or non-standard extensions.
+#
+# Omitted common warnings:
+#
+# Wabi=
+# Waggregate-return
+# Walloc-size-larger-than=BYTES
+# Walloca-larger-than=BYTES
+# Wframe-larger-than=BYTES
+# Wlarger-than=BYTES
+# Wstack-usage=BYTES
+# Wsystem-headers
+# Wtraditional
+# Wtraditional-conversion
+# Wtrampolines
+# Wvla-larger-than=BYTES
+#
+# Omitted C warnings:
+#
+# Wc90-c99-compat
+# Wdeclaration-after-statement
+# Wtraditional
+# Wtraditional-conversion
+#
+# Omitted C++ warnings:
+#
+# Wnamespaces
+# Wtemplates
+
+gcc_common_warnings = [
+  '-Walloc-zero',
+  '-Walloca',
+  '-Wanalyzer-too-complex',
+  '-Warith-conversion',
+  '-Warray-bounds=2',
+  '-Wattribute-alias=2',
+  '-Wcast-align=strict',
+  '-Wcast-qual',
+  '-Wconversion',
+  '-Wdate-time',
+  '-Wdisabled-optimization',
+  '-Wdouble-promotion',
+  '-Wduplicated-branches',
+  '-Wduplicated-cond',
+  '-Wfloat-equal',
+  '-Wformat-overflow=2',
+  '-Wformat-signedness',
+  '-Wformat-truncation=2',
+  '-Wformat=2',
+  '-Wimplicit-fallthrough=2',
+  '-Winit-self',
+  '-Winline',
+  '-Winvalid-pch',
+  '-Wlogical-op',
+  '-Wmissing-declarations',
+  '-Wmissing-include-dirs',
+  '-Wmultichar',
+  '-Wnormalized=nfc',
+  '-Wnull-dereference',
+  '-Wpacked',
+  '-Wpadded',
+  '-Wredundant-decls',
+  '-Wscalar-storage-order',
+  '-Wshadow',
+  '-Wshift-overflow=2',
+  '-Wsizeof-array-argument',
+  '-Wstack-protector',
+  '-Wstrict-aliasing=3',
+  '-Wstrict-overflow=5',
+  '-Wstringop-overflow=3',
+  '-Wsuggest-attribute=cold',
+  '-Wsuggest-attribute=const',
+  '-Wsuggest-attribute=format',
+  '-Wsuggest-attribute=malloc',
+  '-Wsuggest-attribute=noreturn',
+  '-Wsuggest-attribute=pure',
+  '-Wswitch-default',
+  '-Wswitch-enum',
+  '-Wsync-nand',
+  '-Wundef',
+  '-Wunused-const-variable=2',
+  '-Wunused-macros',
+  '-Wvarargs',
+  '-Wvector-operation-performance',
+  '-Wvla',
+  '-Wwrite-strings',
+]
+
+gcc_c_warnings = [
+  '-Wbad-function-cast',
+  '-Wc++-compat',
+  '-Wc99-c11-compat',
+  '-Wdesignated-init',
+  '-Wdiscarded-array-qualifiers',
+  '-Wdiscarded-qualifiers',
+  '-Wincompatible-pointer-types',
+  '-Wjump-misses-init',
+  '-Wmissing-prototypes',
+  '-Wnested-externs',
+  '-Wold-style-definition',
+  '-Wstrict-prototypes',
+  '-Wunsuffixed-float-constants',
+]
+
+# Set all_c_warnings for the current C compiler
+if is_variable('cc')
+  if cc.get_id() == 'clang'
+    all_c_warnings = ['-Weverything']
+  elif cc.get_id() == 'gcc'
+    all_c_warnings = gcc_common_warnings + [
+      '-Wbad-function-cast',
+      '-Wc++-compat',
+      '-Wc99-c11-compat',
+      '-Wdesignated-init',
+      '-Wdiscarded-array-qualifiers',
+      '-Wdiscarded-qualifiers',
+      '-Wincompatible-pointer-types',
+      '-Wjump-misses-init',
+      '-Wmissing-prototypes',
+      '-Wnested-externs',
+      '-Wold-style-definition',
+      '-Wstrict-prototypes',
+      '-Wunsuffixed-float-constants',
+    ]
+  elif cc.get_id() == 'msvc'
+    all_c_warnings = ['/Wall']
+  else
+    all_c_warnings = []
+  endif
+endif
+
+# Set all_cpp_warnings for the current C++ compiler
+if is_variable('cpp')
+  if cpp.get_id() == 'clang'
+    all_cpp_warnings = [
+      '-Weverything',
+      '-Wno-c++98-compat',
+      '-Wno-c++98-compat-pedantic'
+    ]
+  elif cpp.get_id() == 'gcc'
+    all_cpp_warnings = gcc_common_warnings + [
+      '-Wabi-tag',
+      '-Waligned-new=all',
+      '-Wcatch-value=3',
+      '-Wcomma-subscript',
+      '-Wconditionally-supported',
+      '-Wctor-dtor-privacy',
+      '-Wdeprecated-copy-dtor',
+      '-Weffc++',
+      '-Wextra-semi',
+      '-Wmismatched-tags',
+      '-Wmultiple-inheritance',
+      '-Wnoexcept',
+      '-Wnoexcept-type',
+      '-Wnon-virtual-dtor',
+      '-Wold-style-cast',
+      '-Woverloaded-virtual',
+      '-Wplacement-new=2',
+      '-Wredundant-tags',
+      '-Wregister',
+      '-Wsign-promo',
+      '-Wstrict-null-sentinel',
+      '-Wsuggest-final-methods',
+      '-Wsuggest-final-types',
+      '-Wsuggest-override',
+      '-Wuseless-cast',
+      '-Wvirtual-inheritance',
+      '-Wvolatile',
+      '-Wzero-as-null-pointer-constant',
+    ]
+  elif cpp.get_id() == 'msvc'
+    all_cpp_warnings = ['/Wall']
+  else
+    all_cpp_warnings = []
+  endif
+endif
+
+# Set all_objc_warnings for the current Objective C compiler
+if is_variable('objcc')
+  all_objc_warnings = []
+  if objcc.get_id() == 'clang'
+    all_objc_warnings = ['-Weverything']
+  elif objc.get_id() == 'gcc'
+    all_objc_warnings = gcc_common_warnings + [
+      '-Wno-direct-ivar-access',
+    ]
+  else
+    all_objc_warnings = []
+  endif
+endif