Hi Alex,
Thanks for the change. The version you sent didn't end up working here (with
just a CXX project). The line to set the compiler is checking for "CXX" but,
at least on my system, "${_lang}" is set to "c++". Once I changed the line to
check for "CXX" or "c++", it worked fine. I also noticed that /usr/include was
not being added, and it was because the regexp was skipping the last line of
includes. I have modified the regexp slightly, and that worked as well. I
have attached the changed file for you to compare, I am not sure if the changes
are just specific to my system.
Thanks,
Shash
-----Original Message-----
From: Alexander Neundorf [mailto:[email protected]]
Sent: Sun 3/27/2011 11:24 AM
To: [email protected]
Cc: Chatterjee, Shash
Subject: Re: [CMake] Eclipse generator - scanner-discovered include pathsand
pre-processor symbols
Ah, indeed, it was using CMAKE_C_COMPILER also when finding out the C++ stuff,
which works, but only if CMAKE_C_COMPILER is actually set.
Please try the attached version, this should also work with your CXX-only
project.
Let me know whether it works for you.
Thanks
Alex
#=============================================================================
# Copyright 2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
# This file is included in CMakeSystemSpecificInformation.cmake if
# the Eclipse CDT4 extra generator has been selected.
FIND_PROGRAM(CMAKE_ECLIPSE_EXECUTABLE NAMES eclipse DOC "The Eclipse executable")
# This variable is used by the Eclipse generator and appended to the make invocation commands.
SET(CMAKE_ECLIPSE_MAKE_ARGUMENTS "" CACHE STRING "Additional command line arguments when Eclipse invokes make. Enter e.g. -j<some_number> to get parallel builds")
# This variable is used by the Eclipse generator in out-of-source builds only.
SET(ECLIPSE_CDT4_GENERATE_SOURCE_PROJECT FALSE CACHE BOOL "If enabled, CMake will generate a source project for Eclipse in CMAKE_SOURCE_DIR")
MARK_AS_ADVANCED(ECLIPSE_CDT4_GENERATE_SOURCE_PROJECT)
# The Eclipse generator needs to know the standard include path
# so that Eclipse ca find the headers at runtime and parsing etc. works better
# This is done here by actually running gcc with the options so it prints its
# system include directories, which are parsed then and stored in the cache.
MACRO(_DETERMINE_GCC_SYSTEM_INCLUDE_DIRS _lang _resultIncludeDirs _resultDefines)
message(STATUS "Getting include dirs for ${_lang} ...")
SET(${_resultIncludeDirs})
SET(_gccOutput)
FILE(WRITE "${CMAKE_BINARY_DIR}/CMakeFiles/dummy" "\n" )
IF (${_lang} STREQUAL "CXX" OR ${_lang} STREQUAL "c++")
SET(_compilerExecutable "${CMAKE_CXX_COMPILER}")
ELSE (${_lang} STREQUAL "CXX" OR ${_lang} STREQUAL "c++")
SET(_compilerExecutable "${CMAKE_C_COMPILER}")
ENDIF (${_lang} STREQUAL "CXX" OR ${_lang} STREQUAL "c++")
EXECUTE_PROCESS(COMMAND ${_compilerExecutable} -v -E -P -x ${_lang} -dD dummy
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/CMakeFiles
ERROR_VARIABLE _gccOutput
OUTPUT_VARIABLE _gccStdout )
FILE(REMOVE "${CMAKE_BINARY_DIR}/CMakeFiles/dummy")
MESSAGE(STATUS "stderr: -${_gccOutput}-")
MESSAGE(STATUS "stdout: -${_gccStdout}-")
# First find the system include dirs:
IF( "${_gccOutput}" MATCHES "> search starts here[^\n]+\n *(.+ *\n) *End of (search) list" )
# split the output into lines and then remove leading and trailing spaces from each of them:
STRING(REGEX MATCHALL "[^\n]+\n" _includeLines "${CMAKE_MATCH_1}")
FOREACH(nextLine ${_includeLines})
STRING(STRIP "${nextLine}" _includePath)
LIST(APPEND ${_resultIncludeDirs} "${_includePath}")
ENDFOREACH(nextLine)
ENDIF( "${_gccOutput}" MATCHES "> search starts here[^\n]+\n *(.+ *\n) *End of (search) list" )
# now find the builtin macros:
STRING(REGEX MATCHALL "#define[^\n]+\n" _defineLines "${_gccStdout}")
# A few example lines which the regexp below has to match properly:
# #define MAX(a,b) ((a) > (b) ? (a) : (b))
# #define __fastcall __attribute__((__fastcall__))
# #define FOO (23)
# #define __UINTMAX_TYPE__ long long unsigned int
# #define __UINTMAX_TYPE__ long long unsigned int
# #define __i386__ 1
FOREACH(nextLine ${_defineLines})
STRING(REGEX MATCH "^#define +([A-Za-z_][A-Za-z0-9_]*)(\\([^\\)]+\\))? +(.+) *$" _dummy "${nextLine}")
SET(_name "${CMAKE_MATCH_1}${CMAKE_MATCH_2}")
STRING(STRIP "${CMAKE_MATCH_3}" _value)
#MESSAGE(STATUS "m1: -${CMAKE_MATCH_1}- m2: -${CMAKE_MATCH_2}- m3: -${CMAKE_MATCH_3}-")
LIST(APPEND ${_resultDefines} "${_name}")
IF(_value)
LIST(APPEND ${_resultDefines} "${_value}")
ELSE()
LIST(APPEND ${_resultDefines} " ")
ENDIF()
ENDFOREACH(nextLine)
ENDMACRO(_DETERMINE_GCC_SYSTEM_INCLUDE_DIRS _lang)
# Save the current LC_ALL, LC_MESSAGES, and LANG environment variables and set them
# to "C" that way GCC's "search starts here" text is in English and we can grok it.
SET(_orig_lc_all $ENV{LC_ALL})
SET(_orig_lc_messages $ENV{LC_MESSAGES})
SET(_orig_lang $ENV{LANG})
IF(_orig_lc_all)
SET(ENV{LC_ALL} C)
ENDIF(_orig_lc_all)
IF(_orig_lc_messages)
SET(ENV{LC_MESSAGES} C)
ENDIF(_orig_lc_messages)
IF(_orig_lang)
SET(ENV{LANG} C)
ENDIF(_orig_lang)
message(STATUS "This is CMakeFindEclipse.cmake, compiler id is -${CMAKE_C_COMPILER_ID}- , -${CMAKE_CXX_COMPILER_ID}-")
# Now check for C, works for gcc and Intel compiler at least
IF (NOT CMAKE_ECLIPSE_C_SYSTEM_INCLUDE_DIRS)
IF ("${CMAKE_C_COMPILER_ID}" MATCHES GNU OR "${CMAKE_C_COMPILER_ID}" MATCHES Intel)
_DETERMINE_GCC_SYSTEM_INCLUDE_DIRS(c _dirs _defines)
SET(CMAKE_ECLIPSE_C_SYSTEM_INCLUDE_DIRS "${_dirs}" CACHE INTERNAL "C compiler system include directories")
SET(CMAKE_ECLIPSE_C_SYSTEM_DEFINED_MACROS "${_defines}" CACHE INTERNAL "C compiler system defined macros")
ENDIF ("${CMAKE_C_COMPILER_ID}" MATCHES GNU OR "${CMAKE_C_COMPILER_ID}" MATCHES Intel)
ENDIF (NOT CMAKE_ECLIPSE_C_SYSTEM_INCLUDE_DIRS)
# And now the same for C++
IF (NOT CMAKE_ECLIPSE_CXX_SYSTEM_INCLUDE_DIRS)
IF ("${CMAKE_CXX_COMPILER_ID}" MATCHES GNU OR "${CMAKE_CXX_COMPILER_ID}" MATCHES Intel)
_DETERMINE_GCC_SYSTEM_INCLUDE_DIRS(c++ _dirs _defines)
SET(CMAKE_ECLIPSE_CXX_SYSTEM_INCLUDE_DIRS "${_dirs}" CACHE INTERNAL "CXX compiler system include directories")
SET(CMAKE_ECLIPSE_CXX_SYSTEM_DEFINED_MACROS "${_defines}" CACHE INTERNAL "CXX compiler system defined macros")
ENDIF ("${CMAKE_CXX_COMPILER_ID}" MATCHES GNU OR "${CMAKE_CXX_COMPILER_ID}" MATCHES Intel)
ENDIF (NOT CMAKE_ECLIPSE_CXX_SYSTEM_INCLUDE_DIRS)
# Restore original LC_ALL, LC_MESSAGES, and LANG
IF(_orig_lc_all)
SET(ENV{LC_ALL} ${_orig_lc_all})
ENDIF(_orig_lc_all)
IF(_orig_lc_messages)
SET(ENV{LC_MESSAGES} ${_orig_lc_messages})
ENDIF(_orig_lc_messages)
IF(_orig_lang)
SET(ENV{LANG} ${_orig_lang})
ENDIF(_orig_lang)
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