On Tue, 27 Sep 2011 21:56:12 +0000 (UTC) "Joseph S. Myers" <jos...@codesourcery.com> wrote:
> On Mon, 26 Sep 2011, Basile Starynkevitch wrote: > > > Hello All, > > > > It seems to me (file gcc/Makefile.in, definition of DRIVER_DEFINES) that > > the configure-d PREFIX is wired inside gcc.o (hence inside the gcc > > driver executable) without precautions. > > > > In particular, I don't understand if someone can configure gcc with a > > prefix containing weird characters, such as double-quotes " or > > backslashes \ or perhaps even spaces. > > > > My intuition is that GCC won't even build if the prefix contains such > > naughty characters. If it is the case, should we document that.? > > In general it's hard to support this in full generality because of > difficulty escaping things for "make" (and you have "make" - multiple > levels thereof - the shell and C escaping to consider at least). If the > paths to the source and build directories contain special characters it's > particularly problematic (configure scripts get involved as well; some > past autoconf versions had their own problems in this regard, although > this may have been fixed). I do know that and I have been bitten by the multiple levels of escaping in MELT. Actually, for the MELT branch (and the just released MELT 0.9 plugin for GCC 4.6), I came up adding a trivial C generator which produces code like const char foo[]="bar"; even when the bar string contain naughty characters. In MELT it is even a little bit worse, since I do need to stringify the default CFLAGS for the compilation of the C code generated by MELT, and that default string obviously contain spaces. (the MELT plugin runs "make" sometimes, to compile the generated *.c files into a *.so). See http://groups.google.com/group/gcc-melt/browse_thread/thread/74c36fae50a2b47d for more details. The generator is simple and self-contained, on http://gcc.gnu.org/viewcvs/branches/melt-branch/gcc/melt-make-string.c?view=log Cheers. -- Basile STARYNKEVITCH http://starynkevitch.net/Basile/ email: basile<at>starynkevitch<dot>net mobile: +33 6 8501 2359 8, rue de la Faiencerie, 92340 Bourg La Reine, France *** opinions {are only mine, sont seulement les miennes} ***
