8000 Patch #1324762: Change --with-cxx to --with-cxx-main. · python/cpython@0f48d98 · GitHub
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Patch #1324762: Change --with-cxx to --with-cxx-main.
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-356
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6 files changed

+281
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‎Makefile.pre.in

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Original file line numberDiff line numberDiff line change
@@ -30,6 +30,7 @@ VPATH= @srcdir@
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CC= @CC@
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CXX= @CXX@
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MAINCC= @MAINCC@
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LINKCC= @LINKCC@
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AR= @AR@
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RANLIB= @RANLIB@
@@ -157,7 +158,6 @@ LIBC= @LIBC@
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SYSLIBS= $(LIBM) $(LIBC)
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SHLIBS= @SHLIBS@
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MAINOBJ= @MAINOBJ@
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THREADOBJ= @THREADOBJ@
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DLINCLDIR= @DLINCLDIR@
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DYNLOADFILE= @DYNLOADFILE@
@@ -326,9 +326,9 @@ LIBRARY_OBJS= \
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all: $(BUILDPYTHON) oldsharedmods sharedmods
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# Build the interpreter
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$(BUILDPYTHON): Modules/$(MAINOBJ) $(LIBRARY) $(LDLIBRARY)
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$(BUILDPYTHON): Modules/python.o $(LIBRARY) $(LDLIBRARY)
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$(LINKCC) $(LDFLAGS) $(LINKFORSHARED) -o $@ \
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Modules/$(MAINOBJ) \
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Modules/python.o \
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$(BLDLIBRARY) $(LIBS) $(MODLIBS) $(SYSLIBS) $(LDLAST)
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platform: $(BUILDPYTHON)
@@ -448,8 +448,8 @@ Modules/getpath.o: $(srcdir)/Modules/getpath.c Makefile
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-DVPATH='"$(VPATH)"' \
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-o $@ $(srcdir)/Modules/getpath.c
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Modules/ccpython.o: $(srcdir)/Modules/ccpython.cc
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$(CXX) -c $(PY_CFLAGS) -o $@ $(srcdir)/Modules/ccpython.cc
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Modules/python.o: $(srcdir)/Modules/python.c
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$(MAINCC) -c $(PY_CFLAGS) -o $@ $(srcdir)/Modules/python.c
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$(GRAMMAR_H) $(GRAMMAR_C): $(PGEN) $(GRAMMAR_INPUT)
@@ -537,7 +537,7 @@ PYTHON_HEADERS= \
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Include/weakrefobject.h \
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pyconfig.h
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$(LIBRARY_OBJS) $(MODOBJS) Modules/$(MAINOBJ): $(PYTHON_HEADERS)
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$(LIBRARY_OBJS) $(MODOBJS) Modules/python.o: $(PYTHON_HEADERS)
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######################################################################
@@ -813,7 +813,7 @@ libainstall: all
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fi; \
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fi
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$(INSTALL_DATA) Modules/config.c $(DESTDIR)$(LIBPL)/config.c
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$(INSTALL_DATA) Modules/$(MAINOBJ) $(DESTDIR)$(LIBPL)/$(MAINOBJ)
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$(INSTALL_DATA) Modules/python.o $(DESTDIR)$(LIBPL)/python.o
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$(INSTALL_DATA) $(srcdir)/Modules/config.c.in $(DESTDIR)$(LIBPL)/config.c.in
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$(INSTALL_DATA) Makefile $(DESTDIR)$(LIBPL)/Makefile
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$(INSTALL_DATA) Modules/Setup $(DESTDIR)$(LIBPL)/Setup

‎Misc/NEWS

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@@ -82,6 +82,11 @@ Library
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Build
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-----
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- Patch #1324762:Remove ccpython.cc; replace --with-cxx with
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--with-cxx-main. Link with C++ compiler only if --with-cxx-main was
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specified. (Can be overriden by explicitly setting LINKCC.) Decouple
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CXX from --with-cxx-main, see description in README.
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- Patch #1429775: Link extension modules with the shared libpython.
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C API

‎Modules/ccpython.cc

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This file was deleted.

‎README

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Original file line numberDiff line numberDiff line change
@@ -1045,13 +1045,35 @@ Modules/getpath.o.
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--with-libs='libs': Add 'libs' to the LIBS that the python interpreter
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is linked against.
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--with-cxx=<compiler>: Some C++ compilers require that main() is
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compiled with the C++ if there is any C++ code in the application.
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Specifically, g++ on a.out systems may require that to support
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construction of global objects. With this option, the main() function
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of Python will be compiled with <compiler>; use that only if you
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plan to use C++ extension modules, and if your compiler requires
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compilation of main() as a C++ program.
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- 8000 -with-cxx-main=<compiler>: If you plan to use C++ extension modules,
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then -- on some platforms -- you need to compile python's main()
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function with the C++ compiler. With this option, make will use
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<compiler> to compile main() *and* to link the python executable.
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It is likely that the resulting executable depends on the C++
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runtime library of <compiler>. (The default is --without-cxx-main.)
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There are platforms that do not require you to build Python
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with a C++ compiler in order to use C++ extension modules.
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E.g., x86 Linux with ELF shared binaries and GCC 3.x, 4.x is such
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a platform. We recommend that you configure Python
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--without-cxx-main on those platforms because a mismatch
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between the C++ compiler version used to build Python and to
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build a C++ extension module is likely to cause a crash at
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runtime.
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The Python installation also stores the variable CXX that
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determines, e.g., the C++ compiler distutils calls by default
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to build C++ extensions. If you set CXX on the configure command
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line to any string of non-zero length, then configure won't
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change CXX. If you do not preset CXX but pass
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--with-cxx-main=<compiler>, then configure sets CXX=<compiler>.
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In all other cases, configure looks for a C++ compiler by
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some common names (c++, g++, gcc, CC, cxx, cc++, cl) and sets
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CXX to the first compiler it finds. If it does not find any
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C++ compiler, then it sets CXX="".
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Similarly, if you want to change the command used to link the
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python executable, then set LINKCC on the configure command line.
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--with-pydebug: Enable additional debugging code to help track down

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