On Tue, Jul 8, 2025 at 3:45 PM Robert Dubner <rdub...@symas.com> wrote: > > > -----Original Message----- > > From: Andreas Schwab <sch...@suse.de> > > Sent: Tuesday, July 8, 2025 03:16 > > To: Robert Dubner <rdub...@symas.com> > > Cc: Rainer Orth <r...@cebitec.uni-bielefeld.de>; gcc-patches@gcc.gnu.org > > Subject: Re: [PATCH] cobol: Implement CXXFLAGS_FOR_COBOL. > > > > On Jul 07 2025, Robert Dubner wrote: > > > > > Furthermore, even if this method did work, I need the > CXXFLAGS_FOR_COBOL > > > options to appear at the end of the list, not the beginning, since > they > > > may need to override what came before. > > > > Why can't you use CXXFLAGS? > > Because CXXFLAGS applies to everything. > > Not long ago, we added code using std::size() to one of the gcc/cobol > files. Jim and I both use GCC-11, which in its default configuration > provides C++17 features. But somebody compiling using GCC-9 reported that > it led to a failure. > > So, in an attempt to find such things before committing them to > gcc/master, in my development environment I tried > > CXXFLAGS="-std-c++14" ../configure ... > > That leads to a build failure of libcody, with the message to the effect > of "libcody requires C++11".
Still CXXFLAGS is the correct thing to do. And to fix that libcody requirement, of course. By simply dropping NMS_CXX_11 I'd say. > I have been unable to find any method of doing a complete build while > setting compilation options that apply only to the gcc/cobol files. So, I > did the investigation, and created the patch. > > It operates as do some other flags, including CXXFLAGS: > > CXXFLAGS_FOR_COBOL=xxx ..configure ... > > results in gcc/Makefile and gcc/cobol/Makefile that uses xxx for files in > gcc/cobol, and for no other source code trees, in all subsequent builds > unless overridden with > > make CXXFLAGS_FOR_COBOL=yyy > > That's what we want. I have found no other way of doing it. > > > > > -- > > Andreas Schwab, SUSE Labs, sch...@suse.de > > GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 > > "And now for something completely different."
