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COMP: Avoid String.c inclusion by Compaq templates 

The Compaq compiler (on VMS) includes 'String.c' in source files that
use the stl string while looking for template definitions.  This was the
true cause of double-inclusion of the 'kwsysPrivate.h' header.  We work
around the problem by conditionally compiling the entire source file on
a condition only true when really building the source.
This commit is contained in:
Brad King 2009-06-10 11:46:06 -04:00
parent 7a839be972
commit 776e21d1c7
4 changed files with 20 additions and 4 deletions
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6
Source/kwsys/CMakeLists.txt
View File

@ -848,6 +848,12 @@ ENDIF(KWSYS_ENABLE_C AND KWSYS_C_SRCS)
# line to configure the namespace in the C and C++ source files.
ADD_DEFINITIONS("-DKWSYS_NAMESPACE=${KWSYS_NAMESPACE}")
IF(KWSYS_USE_String)
# Activate code in "String.c". See the comment in the source.
SET_SOURCE_FILES_PROPERTIES(String.c PROPERTIES
COMPILE_FLAGS "-DKWSYS_STRING_C")
ENDIF(KWSYS_USE_String)
#-----------------------------------------------------------------------------
# Process execution on windows needs to build a forwarding executable
# that works around a Win9x bug. We encode the executable into a C

10
Source/kwsys/String.c
View File

@ -11,6 +11,14 @@
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifdef KWSYS_STRING_C
/*
All code in this source file is conditionally compiled to work-around
template definition auto-search on VMS. Other source files in this
directory that use the stl string cause the compiler to load this
source to try to get the definition of the string template. This
condition blocks the compiler from seeing the symbols defined here.
*/
#include "kwsysPrivate.h"
#include KWSYS_HEADER(String.h)
@ -105,3 +113,5 @@ int kwsysString_strncasecmp(const char* lhs, const char* rhs, size_t n)
return result;
#endif
}
#endif /* KWSYS_STRING_C */

4
Source/kwsys/kwsysPrivate.h
View File

@ -39,7 +39,5 @@
#define KWSYS_NAMESPACE_STRING1(x) #x
#else
# ifndef __VMS /* Avoid strange false positive on VMS compiler. */
# error "kwsysPrivate.h included multiple times."
# endif
# error "kwsysPrivate.h included multiple times."
#endif

4
bootstrap
View File

@ -1286,6 +1286,7 @@ if [ "x${cmake_cxx_flags}" != "x" ]; then
cmake_cxx_flags="${cmake_cxx_flags} "
fi
cmake_c_flags_String="-DKWSYS_STRING_C"
cmake_c_flags="${cmake_c_flags}-I`cmake_escape \"${cmake_source_dir}/Source\"` \
-I`cmake_escape \"${cmake_bootstrap_dir}\"`"
cmake_cxx_flags="${cmake_cxx_flags}-I`cmake_escape \"${cmake_source_dir}/Source\"` \
@ -1305,8 +1306,9 @@ for a in ${CMAKE_C_SOURCES}; do
done
for a in ${KWSYS_C_SOURCES} ${KWSYS_C_MINGW_SOURCES}; do
src=`cmake_escape "${cmake_source_dir}/Source/kwsys/${a}.c"`
src_flags=`eval echo \\${cmake_c_flags_\${a}}`
echo "${a}.o : ${src} ${dep}" >> "${cmake_bootstrap_dir}/Makefile"
echo " ${cmake_c_compiler} ${cmake_c_flags} -DKWSYS_NAMESPACE=cmsys -c ${src} -o ${a}.o" >> "${cmake_bootstrap_dir}/Makefile"
echo " ${cmake_c_compiler} ${cmake_c_flags} -DKWSYS_NAMESPACE=cmsys ${src_flags} -c ${src} -o ${a}.o" >> "${cmake_bootstrap_dir}/Makefile"
done
for a in ${KWSYS_CXX_SOURCES}; do
src=`cmake_escape "${cmake_source_dir}/Source/kwsys/${a}.cxx"`