On 02/03/2014 12:45 PM, Alan W. Irwin wrote:
It was that difference between the two cases that was confusing me. (As
an aside, I am still left wondering a bit about how cmake was able
to find the python library for the NONE case. It's naming conventions
are different (python27.lib rather than libstdc++.dll.a) so perhaps
there is some default CMAKE_FIND_LIBRARY_PREFIXES and
CMAKE_FIND_LIBRARY_SUFFIXES for the NONE case that allow the python
library but not the stdc++ library to be found. But I am not going to
pursue that question.)
Then as a side note there is a default suffix of ".lib" on windows which
is what e.g. MSVC uses/expects. For gcc this is overridden.
I discovered some time ago that for that traditional build-system case
if both the installed C++ PLplot binding library and the principal
PLplot C library that it links to are built as static libraries, then
any attempt to link an executable to those static libraries with g++
on the command line had to add an explicit reference to libstdc++
either directly if pkg-config is not used or indirectly via
pkg-config. (By the way, I am not sure this is still a necessity so I
will check that tomorrow.)
In theory g++ should link libstdc++ implicitly by default.
Which is one of the reasons why in mixed C/C++ projects g++ should be
used for the final link as well.
For CMake internal builds this is detected based on the source file
languages but can also be enforced by using the LINKER_LANGUAGE target
property.
Any chance your "traditional" build system just needs a nudge to use g++
rather than gcc for the link as well?
Nils
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