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project(Preprocess)
# This test is meant both as a test and as a reference for supported
# syntax on native tool command lines.
# We need ansi C support.
IF(CMAKE_ANSI_CFLAGS)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_ANSI_CFLAGS}")
ENDIF(CMAKE_ANSI_CFLAGS)
#-----------------------------------------------------------------------------
# Construct a C-string literal to test passing through a definition on
# the command line. We configure the value into a header so it can be
# checked in the executable at runtime. The semicolon is handled
# specially because it needs to be escaped in the COMPILE_DEFINITIONS
# property value to avoid separating definitions but the string value
# must not have it escaped inside the configured header.
set(STRING_EXTRA "")
if("${CMAKE_GENERATOR}" MATCHES "Make" AND MSVC)
set(NMAKE 1)
endif("${CMAKE_GENERATOR}" MATCHES "Make" AND MSVC)
if(NOT BORLAND AND NOT "${CMAKE_GENERATOR}" MATCHES "Visual Studio 7$")
# Borland, VS70 IDE: ;
# The Borland compiler will simply not accept a non-escaped semicolon
# on the command line. If it is escaped \; then the escape character
# shows up in the preprocessing output too.
#
# The VS 7.0 IDE separates definitions on semicolons and commas with
# no regard for quotes. Fortunately VS 7.1 and above are okay.
set(SEMICOLON "\;")
endif(NOT BORLAND AND NOT "${CMAKE_GENERATOR}" MATCHES "Visual Studio 7$")
if(NOT BORLAND AND NOT WATCOM)
# Borland, WMake: multiple spaces
# The make tool seems to remove extra whitespace from inside
# quoted strings when passing to the compiler. It does not have
# trouble passing to other tools, and the compiler may be directly
# invoked from the command line.
set(STRING_EXTRA "${STRING_EXTRA} ")
endif(NOT BORLAND AND NOT WATCOM)
if(NOT "${CMAKE_GENERATOR}" MATCHES "Visual Studio")
# VS: ,
# Visual Studio will not accept a comma in the value of a definition.
# The comma-separated list of PreprocessorDefinitions in the project
# file seems to be parsed before the content of entries is examined.
set(STRING_EXTRA "${STRING_EXTRA},")
endif(NOT "${CMAKE_GENERATOR}" MATCHES "Visual Studio")
if(NOT MINGW)
# MinGW: &
# When inside -D"FOO=\"a & b\"" MinGW make wants -D"FOO=\"a "&" b\""
# but it does not like quoted ampersand elsewhere.
set(STRING_EXTRA "${STRING_EXTRA}&")
endif(NOT MINGW)
if(NOT MINGW)
# MinGW: |
# When inside -D"FOO=\"a | b\"" MinGW make wants -D"FOO=\"a "|" b\""
# but it does not like quoted pipe elsewhere.
set(STRING_EXTRA "${STRING_EXTRA}|")
endif(NOT MINGW)
if(NOT BORLAND AND NOT MINGW AND NOT NMAKE)
# Borland, NMake, MinGW: ^
# When inside -D"FOO=\"a ^ b\"" they make wants -D"FOO=\"a "^" b\""
# but do not like quoted carrot elsewhere. In NMake the non-quoted
# syntax works when the flags are not in a make variable.
set(STRING_EXTRA "${STRING_EXTRA}^")
endif(NOT BORLAND AND NOT MINGW AND NOT NMAKE)
if(NOT BORLAND AND NOT MINGW AND NOT NMAKE)
# Borland, MinGW: < >
# Angle-brackets have funny behavior that is hard to escape.
set(STRING_EXTRA "${STRING_EXTRA}<>")
endif(NOT BORLAND AND NOT MINGW AND NOT NMAKE)
# General: \"
# Make tools do not reliably accept \\\" syntax:
# - MinGW and MSYS make tools crash with \\\"
# - Borland make actually wants a mis-matched quote \\"
# or $(BACKSLASH)\" where BACKSLASH is a variable set to \\
# - VS IDE gets confused about the bounds of the definition value \\\"
# - NMake is okay with just \\\"
if(NMAKE OR "${CMAKE_GENERATOR}" MATCHES "Unix Makefiles")
set(STRING_EXTRA "${STRING_EXTRA}\\\"")
endif(NMAKE OR "${CMAKE_GENERATOR}" MATCHES "Unix Makefiles")
# General: #
# MSVC will not accept a # in the value of a string definition on the
# command line. The character seems to be simply replaced by an
# equals =. According to "cl -help" definitions may be specified by
# -DMACRO#VALUE as well as -DMACRO=VALUE. It must be implemented by a
# simple search-and-replace.
#
# The Borland compiler will parse both # and \# as just # but the make
# tool seems to want \# sometimes and not others.
#
# Unix make does not like # in variable settings without extra
# escaping. This could probably be fixed but since MSVC does not
# support it and it is not an operator it is not worthwhile.
# Compose the final test string.
set(STRING_VALUE "hello `~!@$%*)(_+-=}{][:'.?/ ${STRING_EXTRA}world")
#-----------------------------------------------------------------------------
# Function-style macro command-line support:
# - Borland does not support
# - MSVC does not support
# - Watcom does not support
# - GCC supports
# Too few platforms support this to bother implementing.
# People can just configure headers with the macros.
#-----------------------------------------------------------------------------
# Construct a sample expression to pass as a macro definition.
set(EXPR "x*y+!(x==(y+1*2))*f(x%2)")
if(NOT WATCOM)
# Watcom does not support - or / because it parses them as options.
set(EXPR "${EXPR}+y/x-x")
endif(NOT WATCOM)
#-----------------------------------------------------------------------------
# Inform the test if the debug configuration is getting built.
# The NDEBUG definition takes care of this for release.
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -DPREPROCESS_DEBUG")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DPREPROCESS_DEBUG")
# Inform the test if it built from Xcode or VS6 IDE.
if(XCODE)
set(PREPROCESS_XCODE 1)
endif(XCODE)
if("${CMAKE_GENERATOR}" MATCHES "Visual Studio 6")
set(PREPROCESS_VS6 1)
set(VS6 _vs6)
endif("${CMAKE_GENERATOR}" MATCHES "Visual Studio 6")
# Test old-style definitions.
add_definitions(-DOLD_DEF -DOLD_EXPR=2)
add_executable(Preprocess preprocess.c preprocess${VS6}.cxx)
set(FILE_PATH "${Preprocess_SOURCE_DIR}/file_def.h")
set(TARGET_PATH "${Preprocess_SOURCE_DIR}/target_def.h")
# Set some definition properties.
foreach(c "" "_DEBUG" "_RELEASE")
set_property(
TARGET Preprocess
PROPERTY COMPILE_DEFINITIONS${c} "TARGET_DEF${c}"
)
set_property(
SOURCE preprocess.c preprocess${VS6}.cxx
PROPERTY COMPILE_DEFINITIONS${c} "FILE_DEF${c}"
)
endforeach(c)
# Add definitions with values. VS6 does not support this.
if(NOT PREPROCESS_VS6)
set_property(
TARGET Preprocess
APPEND PROPERTY COMPILE_DEFINITIONS
"TARGET_STRING=\"${STRING_VALUE}${SEMICOLON}\""
"TARGET_EXPR=${EXPR}"
"TARGET_PATH=\"${TARGET_PATH}\""
)
set_property(
SOURCE preprocess.c preprocess${VS6}.cxx
APPEND PROPERTY COMPILE_DEFINITIONS
"FILE_STRING=\"${STRING_VALUE}${SEMICOLON}\""
"FILE_EXPR=${EXPR}"
"FILE_PATH=\"${FILE_PATH}\""
)
endif(NOT PREPROCESS_VS6)
# Helper target for running test manually in build tree.
add_custom_target(drive COMMAND Preprocess)
# Configure the header file with the desired string value.
if(SEMICOLON)
set(STRING_VALUE "${STRING_VALUE};")
endif(SEMICOLON)
configure_file(${Preprocess_SOURCE_DIR}/preprocess.h.in
${Preprocess_BINARY_DIR}/preprocess.h)
include_directories(${Preprocess_BINARY_DIR})
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