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c++ - STLport vs C

reply Wu Yongwei <Wu_member pathlink.com> writes:
I found a strange compatibility problem between STLport and Standard C.  In
order to use STLport, I must modify sc.ini to add "% P%\..\stlport\stlport"
before "% P%\..\include".  However, with this change, the "-A" option of dmc no
longer works (it is required to, say, compile GC test programs without
modifications).  The error reported is:


^
C:\dm\bin\..\stlport\stlport\stl/_config.h(370) : Preprocessor error:
'_STLP_DEFAULT_TYPE_PARAM' is already defined
leak_test.c(22) : Error: need at least one external def
--- errorlevel 1

Any decent fix for that? (I guess header files like stdio.h under
dm/stlport/stlport should have some #ifdef __cplusplus guides.)

Best regards,

Yongwei
Apr 11 2006
parent Wu Yongwei <Wu_member pathlink.com> writes:
In article <e1fnt5$1nvt$1 digitaldaemon.com>, Wu Yongwei says...

I found a strange compatibility problem between STLport and Standard C.  In
order to use STLport, I must modify sc.ini to add "% P%\..\stlport\stlport"
before "% P%\..\include".  However, with this change, the "-A" option of dmc no
longer works (it is required to, say, compile GC test programs without
modifications).  The error reported is:


^
C:\dm\bin\..\stlport\stlport\stl/_config.h(370) : Preprocessor error:
'_STLP_DEFAULT_TYPE_PARAM' is already defined
leak_test.c(22) : Error: need at least one external def
--- errorlevel 1

Any decent fix for that? (I guess header files like stdio.h under
dm/stlport/stlport should have some #ifdef __cplusplus guides.)


My current work-around:

1) Remove the stlport part from sc.ini;
2) Create a dmcpp.bat, containing something like "dmc -ID:\dm\stlport\stlport
-cpp %*";
3) Use dmcpp to build (Standard) C++ programs.

It is inconvenient, may need coordination with other developers, and has the
side-effect that any "-I" option specified on the command line goes AFTER the
stlport path.  The better way should be that dmc can define C++-specific include
directories independent of the C include directories (in sc.ini). GCC behaves
this way, both by default setting and by environment variables (CPATH for C/C++,
C_INCLUDE_PATH for C, and CPLUS_INCLUDE_PATH for C++).

Best regards,

Yongwei
Apr 12 2006