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authorAllen Byrne <byrn@hdfgroup.org>2018-08-16 20:45:17 (GMT)
committerAllen Byrne <byrn@hdfgroup.org>2018-08-16 20:45:31 (GMT)
commit454b04176ae8daeadcd26bb532ed77c4c051a9c3 (patch)
tree237d4f8f05d0e6f48b09f88d6bb5741dfe0fd150 /release_docs/INSTALL_Warnings.txt
parent7d7929d43fdb97b0cf44044eb4ab7211e955b794 (diff)
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Update cmake warnings to match the autotools files better
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+***********************************************************************
+* COMPILER WARNINGS OPTIONS
+***********************************************************************
+
+ Table of Contents
+
+Section I: Managing Warnings
+Section II: Default Warnings
+Section III: All Warnings
+Section IV: Group 0 Warnings
+Section V: Group 1 Warnings
+Section VI: Group 2 Warnings
+Section VII: Group 3 Warnings
+Section VIII: Group 4 Warnings
+Section IX: Disable Warnings
+
+************************************************************************
+
+
+========================================================================
+I. Managing Warnings
+========================================================================
+Compiler warnings are managed by setting the compiler flags variables.
+
+Autotools uses the H5_CFLAGS and H5_CXXFLAGS, both variables set the flags nearly
+ identical, along with H5_FCFLAGS for Fortran. Autotools uses the type
+ and version of the compiler to determine which warning flags are used.
+ However, there is an option, enable-developer-warnings, to enable extra
+ flags for developers.
+
+CMake uses the CMAKE_C_FLAGS and CMAKE_CXX_FLAGS, both sets are nearly
+ identical, along with CMAKE_Fortran_FLAGS for Fortran. CMake has a
+ minimum set of flags for GNU type compilers and for MSVC compilers. In
+ addition, CMake breaks the list of flags into groups. The groups for
+ GNU are roughly associated with the version of the compiler, while
+ the MSVC groups are associated with the warning levels for the
+ Microsoft compilers. The CMake option for enabling extra developer
+ warnings is HDF5_ENABLE_DEV_WARNINGS.
+
+Custom settings can be used by setting;
+ Environment variables H5_CFLAGS and H5_CXXFLAGS for Autotools
+ CMake defines CMAKE_C_FLAGS and CMAKE_CXX_FLAGS for CMake
+
+
+========================================================================
+II. Default Warnings
+========================================================================
+
+--------------------------------------------------
+Autotools UNIX warnings added to H5_CFLAGS
+--------------------------------------------------
+ -std=c99
+
+ the following warning switches should not raise warnings by the current code
+ -pedantic
+ -Wall
+ -Wextra
+ -Wbad-function-cast
+ -Wc++-compat
+ -Wcast-align
+ -Wcast-qual
+ -Wconversion
+ -Wdeclaration-after-statement
+ -Wdisabled-optimization
+ -Wfloat-equal
+ -Wformat=2
+ -Winit-self
+ -Winvalid-pch
+ -Wmissing-declarations
+ -Wmissing-include-dirs
+ -Wmissing-prototypes
+ -Wnested-externs
+ -Wold-style-definition
+ -Wpacked
+ -Wpointer-arith
+ -Wredundant-decls
+ -Wshadow
+ -Wstrict-prototypes
+ -Wswitch-default
+ -Wswitch-enum
+ -Wundef
+ -Wunused-macros
+ -Wunsafe-loop-optimizations
+ -Wwrite-strings
+
+ enable-developer-warnings=ON
+ -Winline
+ -Waggregate-return
+ -Wmissing-format-attribute
+ -Wmissing-noreturn
+ enable-developer-warnings=OFF
+ -Wno-inline
+ -Wno-aggregate-return
+ -Wno-missing-format-attribute
+ -Wno-missing-noreturn
+
+IF GCC <= 4.3
+ -Wno-long-long
+ -Wvolatile-register-var
+ -Wstrict-overflow
+
+IF GCC <= 4.4
+ -Wno-long-long
+ -Wvolatile-register-var
+ -Wstrict-overflow
+ -Wlogical-op
+ -Wvla
+
+IF GCC <= 4.5
+ -Wno-long-long
+ -Wvolatile-register-var
+ -Wstrict-overflow
+ -Wlogical-op
+ -Wvla
+ -Wlarger-than=2048
+ -Wsync-nand
+ -Wframe-larger-than=16384
+ -Wpacked-bitfield-compat
+
+IF GCC <= 4.6
+ -Wno-long-long
+ -Wlogical-op
+ -Wvla
+ -Wlarger-than=2048
+ -Wsync-nand
+ -Wframe-larger-than=16384
+ -Wpacked-bitfield-compat
+ -Wstrict-aliasing
+ -Wstrict-overflow=5
+ -Wjump-misses-init
+ -Wunsuffixed-float-constants
+
+IF GCC <= 4.7
+ -Wno-long-long
+ -Wlogical-op
+ -Wvla
+ -Wlarger-than=2048
+ -Wsync-nand
+ -Wframe-larger-than=16384
+ -Wpacked-bitfield-compat
+ -Wstrict-aliasing
+ -Wstrict-overflow=5
+ -Wjump-misses-init
+ -Wunsuffixed-float-constants
+ -Wdouble-promotion
+ -Wtrampolines
+ enable-developer-warnings=ON:
+ -Wsuggest-attribute=const
+ enable-developer-warnings=OFF:
+ -Wno-suggest-attribute=const
+
+IF GCC <= 4.8
+ -Wlogical-op
+ -Wvla
+ -Wlarger-than=2048
+ -Wsync-nand
+ -Wframe-larger-than=16384
+ -Wpacked-bitfield-compat
+ -Wstrict-overflow=5
+ -Wjump-misses-init
+ -Wunsuffixed-float-constants
+ -Wdouble-promotion
+ -Wtrampolines
+ -Wstack-usage=8192
+ -Wvector-operation-performance
+ enable-developer-warnings=ON:
+ -Wsuggest-attribute=const
+ -Wsuggest-attribute=pure
+ -Wsuggest-attribute=noreturn
+ enable-developer-warnings=OFF:
+ -Wno-suggest-attribute=const
+ -Wno-suggest-attribute=pure
+ -Wno-suggest-attribute=noreturn
+
+IF GCC <= 4.9
+ -Wlogical-op
+ -Wvla
+ -Wlarger-than=2048
+ -Wsync-nand
+ -Wframe-larger-than=16384
+ -Wpacked-bitfield-compat
+ -Wstrict-overflow=5
+ -Wjump-misses-init
+ -Wdouble-promotion
+ -Wtrampolines
+ -Wstack-usage=8192
+ -Wvector-operation-performance
+ enable-developer-warnings=ON:
+ -Wsuggest-attribute=const
+ -Wsuggest-attribute=pure
+ -Wsuggest-attribute=noreturn
+ -Wsuggest-attribute=format
+ enable-developer-warnings=OFF:
+ -Wno-suggest-attribute=const
+ -Wno-suggest-attribute=pure
+ -Wno-suggest-attribute=noreturn
+ -Wno-suggest-attribute=format
+
+IF GCC < 5
+ -Wlogical-op
+ -Wvla
+ -Wlarger-than=2048
+ -Wsync-nand
+ -Wframe-larger-than=16384
+ -Wpacked-bitfield-compat
+ -Wstrict-overflow=5
+ -Wjump-misses-init
+ -Wunsuffixed-float-constants
+ -Wdouble-promotion
+ -Wtrampolines
+ -Wstack-usage=8192
+ -Wvector-operation-performance
+ -Wdate-time
+ enable-developer-warnings=ON:
+ -Wsuggest-attribute=const
+ -Wsuggest-attribute=pure
+ -Wsuggest-attribute=noreturn
+ -Wsuggest-attribute=format
+ enable-developer-warnings=OFF:
+ -Wno-suggest-attribute=const
+ -Wno-suggest-attribute=pure
+ -Wno-suggest-attribute=noreturn
+ -Wno-suggest-attribute=format
+
+IF GCC < 6
+ -Wlogical-op
+ -Wvla
+ -Wlarger-than=2048
+ -Wsync-nand
+ -Wframe-larger-than=16384
+ -Wpacked-bitfield-compat
+ -Wstrict-overflow=5
+ -Wjump-misses-init
+ -Wunsuffixed-float-constants
+ -Wdouble-promotion
+ -Wtrampolines
+ -Wstack-usage=8192
+ -Wvector-operation-performance
+ -Wdate-time
+ -Warray-bounds=2
+ -Wc99-c11-compat
+ enable-developer-warnings=ON:
+ -Wsuggest-attribute=const
+ -Wsuggest-attribute=pure
+ -Wsuggest-attribute=noreturn
+ -Wsuggest-attribute=format
+ enable-developer-warnings=OFF:
+ -Wno-suggest-attribute=const
+ -Wno-suggest-attribute=pure
+ -Wno-suggest-attribute=noreturn
+ -Wno-suggest-attribute=format
+
+IF GCC < 7
+ -Wlogical-op
+ -Wvla
+ -Wlarger-than=2048
+ -Wsync-nand
+ -Wframe-larger-than=16384
+ -Wpacked-bitfield-compat
+ -Wstrict-overflow=5
+ -Wjump-misses-init
+ -Wunsuffixed-float-constants
+ -Wdouble-promotion
+ -Wtrampolines
+ -Wstack-usage=8192
+ -Wvector-operation-performance
+ -Wdate-time
+ -Warray-bounds=2
+ -Wc99-c11-compat
+ -Wnull-dereference
+ -Wunused-const-variable
+ -Wduplicated-cond -Whsa
+ enable-developer-warnings=ON:
+ -Wsuggest-attribute=const
+ -Wsuggest-attribute=pure
+ -Wsuggest-attribute=noreturn
+ -Wsuggest-attribute=format
+ enable-developer-warnings=OFF:
+ -Wno-suggest-attribute=const
+ -Wno-suggest-attribute=pure
+ -Wno-suggest-attribute=noreturn
+ -Wno-suggest-attribute=format
+
+
+--------------------------------------------
+CMake warnings added to CMAKE_C_FLAGS
+--------------------------------------------
+
+IF GNU GCC
+ -pedantic
+ -Wall
+ -Wextra
+ -Wbad-function-cast
+ -Wc++-compat
+ -Wcast-align
+ -Wcast-qual
+ -Wconversion
+ -Wdeclaration-after-statement
+ -Wdisabled-optimization
+ -Wfloat-equal
+ -Wformat=2
+ -Winit-self
+ -Winvalid-pch
+ -Wmissing-declarations
+ -Wmissing-include-dirs
+ -Wmissing-prototypes
+ -Wnested-externs
+ -Wold-style-definition
+ -Wpacked
+ -Wpointer-arith
+ -Wredundant-decls
+ -Wshadow
+ -Wstrict-prototypes
+ -Wswitch-default
+ -Wswitch-enum
+ -Wundef
+ -Wunused-macros
+ -Wunsafe-loop-optimizations
+ -Wwrite-strings
+
+ -fmessage-length=0
+ HDF5_ENABLE_DEV_WARNINGS=ON
+ -Winline
+ -Waggregate-return
+ HDF5_ENABLE_DEV_WARNINGS=OFF
+ -Wno-unused-parameter
+ -Wno-inline
+ -Wno-aggregate-return
+
+
+========================================================================
+III. All Warnings in CMake
+========================================================================
+
+Default: HDF5_ENABLE_DEV_WARNINGS:BOOL=OFF
+ For Visual Studio:
+ /W3
+
+HDF5_ENABLE_ALL_WARNINGS:BOOL=ON
+ For Visual Studio:
+ /Wall
+ /wd4668
+
+ For GNU GCC
+ Group 0 flags
+ Group 1 flags
+ Group 2 flags
+
+
+========================================================================
+IV. Group 0 Warnings in CMake
+========================================================================
+
+Default: HDF5_ENABLE_GROUPZERO_WARNINGS:BOOL=OFF
+
+HDF5_ENABLE_GROUPZERO_WARNINGS:BOOL=ON
+ For Visual Studio
+ /W1
+
+ For GNU GCC
+ Default Warnings
+
+
+========================================================================
+V. Group 1 Warnings in CMake
+========================================================================
+
+Default: HDF5_ENABLE_GROUPONE_WARNINGS:BOOL=OFF
+
+HDF5_ENABLE_GROUPONE_WARNINGS:BOOL=ON
+ For Visual Studio
+ /W2
+
+ For GNU GCC
+ IF GCC >= 4.3
+ -Wlogical-op
+ -Wvla
+ -Wlarger-than=2048
+ IF GCC >= 4.4
+ -Wsync-nand
+ -Wframe-larger-than=16384
+ -Wpacked-bitfield-compat
+ IF GCC >= 4.5
+ -Wstrict-overflow=5
+ -Wjump-misses-init
+ -Wunsuffixed-float-constants
+
+
+========================================================================
+VI. Group 2 Warnings in CMake
+========================================================================
+
+Default: HDF5_ENABLE_GROUPTWO_WARNINGS:BOOL=OFF
+
+HDF5_ENABLE_GROUPTWO_WARNINGS:BOOL=ON
+ For Visual Studio
+ /W3
+
+ For GNU GCC
+ IF GCC >= 4.6
+ -Wdouble-promotion
+ -Wtrampolines
+ enable-developer-warnings=ON:
+ -Wsuggest-attribute=const
+ enable-developer-warnings=OFF:
+ -Wno-suggest-attribute=const
+ IF GCC >= 4.7
+ -Wstack-usage=8192
+ -Wvector-operation-performance
+ enable-developer-warnings=ON:
+ -Wsuggest-attribute=pure
+ -Wsuggest-attribute=noreturn
+ enable-developer-warnings=OFF:
+ -Wno-suggest-attribute=pure
+ -Wno-suggest-attribute=noreturn
+ IF GCC >= 4.8
+ enable-developer-warnings=ON:
+ -Wsuggest-attribute=format
+ enable-developer-warnings=OFF:
+ -Wno-suggest-attribute=format
+ IF GCC >= 4.8
+ -Wdate-time
+
+
+========================================================================
+VII. Group 3 Warnings in CMake
+========================================================================
+
+Default: HDF5_ENABLE_GROUPTHREE_WARNINGS:BOOL=OFF
+
+HDF5_ENABLE_GROUPTHREE_WARNINGS:BOOL=ON
+ For Visual Studio
+ /W4
+
+ For GNU GCC
+ IF GCC >= 5.1
+ -Warray-bounds=2
+ -Wc99-c11-compat
+
+
+========================================================================
+VIII. Group 4 Warnings in CMake
+========================================================================
+
+Default: HDF5_ENABLE_GROUPFOUR_WARNINGS:BOOL=OFF
+
+HDF5_ENABLE_GROUPFOUR_WARNINGS:BOOL=ON
+ For GNU GCC
+ IF GCC >= 6.0
+ -Wnull-dereference
+ -Wunused-const-variable
+ -Wduplicated-cond
+ -Whsa
+
+
+========================================================================
+IX. Disable Warnings in CMake
+========================================================================
+
+Default: HDF5_DISABLE_COMPILER_WARNINGS:BOOL=OFF
+
+HDF5_DISABLE_COMPILER_WARNINGS:BOOL=ON
+ For Visual Studio
+ HDF5_WARNINGS_BLOCKED:BOOL=ON
+ /W0
+
+ For GNU GCC
+ -w
+
+
+========================================================================
+For further assistance, send email to help@hdfgroup.org
+========================================================================
+