[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Change by Pablo Galindo Salgado : -- nosy: -pablogsal ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Marco Sulla added the comment: I agree with Pablo Galindo Salgado: https://bugs.python.org/issue35912#msg334942 The "quick and dirty" solution is to change MAINCC to CC, for _testembed.c AND python.c (g++ fails with both). After that, _testembed.c and python.c should be changed so they can

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

STINNER Victor added the comment: I marked bpo-35912 as a duplicate of this issue (which has a longer history). -- ___ Python tracker ___

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Pablo Galindo Salgado added the comment: This seems like a duplicate of https://bugs.python.org/issue35912 -- nosy: +pablogsal ___ Python tracker ___

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Marco Sulla added the comment: Furthermore, I have not understood a think: if I understood well, --with-cxx-main is used on _some_ platforms that have problems with C++ extensions. What platforms? Is there somewhere a unit test for testing if Python compiled on one of these platforms with

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Marco Sulla added the comment: Okay... if I have understood well, the problem is with C++ Extensions. Some questions: 1. does this problem exists yet? 2. if yes, maybe Python have to wrap the python.c and _testembed.c so they can also be compiled with a C++ compiler? 3. --with-cxx-main is

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Jeremy Kloth added the comment: What seems to be, at least, the conclusion of the thread: https://mail.python.org/archives/list/python-...@python.org/thread/YXMD5EIHAODRZGTQ3HU74OPGEBAVCSK6/ -- nosy: +jkloth ___ Python tracker

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Marco Sulla added the comment: Mmmm... wait a moment. It seems the behavior is intended: https://bugs.python.org/issue1324762 I quote: The patch contains the following changes: [...] 2) The compiler used to translate python's main() function is stored in the configure / Makefile

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Marco Sulla added the comment: https://github.com/python/cpython/pull/18721 -- ___ Python tracker ___ ___ Python-bugs-list mailing

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Change by Marco Sulla : -- keywords: +patch pull_requests: +18079 stage: -> patch review pull_request: https://github.com/python/cpython/pull/18721 ___ Python tracker ___

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Marco Sulla added the comment: The problem is here: Programs/_testembed.o: $(srcdir)/Programs/_testembed.c $(MAINCC) -c $(PY_CORE_CFLAGS) -o $@ $(srcdir)/Programs/_testembed.c `MAINCC` in my Makefile is `g++-9`. Probably, MAINCC is set to the value of ``--with-cxx-main`, if

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

STINNER Victor added the comment: > See also https://bugs.python.org/issue23644 This issue is unrelated and has been fixed. -- ___ Python tracker ___

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

STINNER Victor added the comment: _testembed is build by Makefile: Programs/_testembed: Programs/_testembed.o $(LIBRARY) $(LDLIBRARY) $(PY3LIBRARY) $(LINKCC) $(PY_CORE_LDFLAGS) $(LINKFORSHARED) -o $@ Programs/_testembed.o $(BLDLIBRARY) $(LIBS) $(MODLIBS) $(SYSLIBS) with: MAINCC=

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Marco Sulla added the comment: I think in this case the error is more trivial: simply `Programs/_testembed.c` is compiled with g++ but it should be compiled with gcc. Indeed, there are much gcc-only options in the compilation of `Programs/_testembed.c`, and g++ complains about them: >

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

Karthikeyan Singaravelan added the comment: See also https://bugs.python.org/issue23644 -- nosy: +vstinner, xtreak ___ Python tracker ___

[issue39697] Failed to build with --with-cxx-main=g++-9.2.0

New submission from Marco Sulla : I tried to compile Python 3.9 with: CC=gcc-9.2.0 ./configure --enable-optimizations --with-lto --with-cxx-main=g++-9.2.0 make -j 2 I got this error: g++-9.2.0 -c -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -flto -fuse-linker-plugin