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Add cmake module finding the appropriate variant of the "restrict" keyword.
Could that be useful to have in kdelibs/cmake/modules ?
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cmake/CheckRestrictKeyword.cmake
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87
cmake/CheckRestrictKeyword.cmake
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# This module checks if the C++ compiler supports the restrict keyword or
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# some variant of it. The following variants are checked for in that order:
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# 1. restrict (The standard C99 keyword, not yet in C++ standard)
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# 2. __restrict (G++ has it)
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# 3. __restrict__ (G++ has it too)
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# 4. _Restrict (seems to be used by Sun's compiler)
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# These four cases seem to cover all existing variants; however some C++
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# compilers don't support any variant, in which case the _RESULT variable is
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# set to empty value.
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#
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# Copyright Benoit Jacob 2007 <jacob@math.jussieu.fr>
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#
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# Redistribution and use is allowed according to the terms of the BSD license.
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# For details see the accompanying COPYING-CMAKE-SCRIPTS file in
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# kdelibs/cmake/modules.
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INCLUDE(CheckCXXSourceCompiles)
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MACRO (CHECK_RESTRICT_KEYWORD _RESULT)
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SET(_CHECK_restrict_KEYWORD_SRC "
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char f( const char * restrict x )
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{
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return *x;
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}
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int main(int argc, char *argv[]) { return 0; }
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")
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SET(_CHECK___restrict_KEYWORD_SRC "
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char f( const char * __restrict x )
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{
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return *x;
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}
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int main(int argc, char *argv[]) { return 0; }
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")
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SET(_CHECK___restrict___KEYWORD_SRC "
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char f( const char * __restrict__ x )
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{
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return *x;
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}
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int main(int argc, char *argv[]) { return 0; }
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")
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SET(_CHECK__Restrict_KEYWORD_SRC "
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char f( const char * _Restrict x )
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{
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return *x;
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}
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int main(int argc, char *argv[]) { return 0; }
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")
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CHECK_CXX_SOURCE_COMPILES("${_CHECK_restrict_KEYWORD_SRC}"
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HAVE_KEYWORD_restrict)
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IF(HAVE_KEYWORD_restrict)
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SET(${_RESULT} restrict)
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ELSE(HAVE_KEYWORD_restrict)
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CHECK_CXX_SOURCE_COMPILES("${_CHECK___restrict_KEYWORD_SRC}"
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HAVE_KEYWORD___restrict)
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IF(HAVE_KEYWORD___restrict)
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SET(${_RESULT} __restrict)
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ELSE(HAVE_KEYWORD___restrict)
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CHECK_CXX_SOURCE_COMPILES("${_CHECK___restrict___KEYWORD_SRC}"
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HAVE_KEYWORD___restrict__)
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IF(HAVE_KEYWORD___restrict__)
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SET(${_RESULT} __restrict__)
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ELSE(HAVE_KEYWORD___restrict__)
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CHECK_CXX_SOURCE_COMPILES("${_CHECK__Restrict_KEYWORD_SRC}"
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HAVE_KEYWORD__Restrict)
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IF(HAVE_KEYWORD__Restrict)
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SET(${_RESULT} _Restrict)
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ELSE(HAVE_KEYWORD__Restrict)
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SET(${_RESULT} ) # no variant of restrict keyword supported
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ENDIF(HAVE_KEYWORD__Restrict)
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ENDIF(HAVE_KEYWORD___restrict__)
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ENDIF(HAVE_KEYWORD___restrict)
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ENDIF(HAVE_KEYWORD_restrict)
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ENDMACRO (CHECK_RESTRICT_KEYWORD)
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@ -6,6 +6,7 @@ INCLUDE (CheckIeeeMath)
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INCLUDE (CheckSysvMath)
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INCLUDE (CheckSysvMath)
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INCLUDE (CheckLongDouble)
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INCLUDE (CheckLongDouble)
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INCLUDE (CheckLongLong)
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INCLUDE (CheckLongLong)
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INCLUDE (CheckRestrictKeyword)
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FILE(GLOB tvmet_header_SRCS "*.h")
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FILE(GLOB tvmet_header_SRCS "*.h")
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@ -18,6 +19,7 @@ CHECK_IEEE_MATH (TVMET_HAVE_IEEE_MATH)
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CHECK_SYSV_MATH (TVMET_HAVE_SYSV_MATH)
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CHECK_SYSV_MATH (TVMET_HAVE_SYSV_MATH)
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CHECK_LONG_DOUBLE (TVMET_HAVE_LONG_DOUBLE)
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CHECK_LONG_DOUBLE (TVMET_HAVE_LONG_DOUBLE)
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CHECK_LONG_DOUBLE (TVMET_HAVE_LONG_LONG)
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CHECK_LONG_DOUBLE (TVMET_HAVE_LONG_LONG)
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CHECK_RESTRICT_KEYWORD (TVMET_RESTRICT_KEYWORD)
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# the following are directories where stuff will be installed to
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# the following are directories where stuff will be installed to
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SET(INCLUDE_INSTALL_DIR
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SET(INCLUDE_INSTALL_DIR
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@ -28,7 +28,7 @@
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/* Define to 1 if you have the <unistd.h> header file. */
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/* Define to 1 if you have the <unistd.h> header file. */
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#cmakedefine TVMET_HAVE_UNISTD_H 1
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#cmakedefine TVMET_HAVE_UNISTD_H 1
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#define _tvmet_restrict __restrict__
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#define _tvmet_restrict @TVMET_RESTRICT_KEYWORD@
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/* _INCLUDE_TVMET_CONFIG_H */
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/* _INCLUDE_TVMET_CONFIG_H */
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#endif
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#endif
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