From 8632c7cb76b284e96decb11cab36c1cdbdf2983f Mon Sep 17 00:00:00 2001 From: Eli Zaretskii Date: Mon, 1 Oct 2001 11:23:53 +0000 Subject: [PATCH] Mention the broken cpp from GCC snapshots around Sep 30, 2001, and show the command line to force `configure' to use -traditional. --- etc/PROBLEMS | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/etc/PROBLEMS b/etc/PROBLEMS index 55291c1ef82..64cf3485f3f 100644 --- a/etc/PROBLEMS +++ b/etc/PROBLEMS @@ -6,12 +6,23 @@ in compiling, installing and running GNU Emacs. This may happen if you use a development version of GNU `cpp' from one of the GCC snapshots between Oct 2000 and Feb 2001, or from a released version of GCC newer than 2.95.2 which was prepared around those -dates. The preprocessor in those versions expands ".." into ". .", -which breaks relative file names that reference the parent directory. +dates; similar problems were reported with some snapshots of GCC 3.1 +around Sep 30 2001. The preprocessor in those versions is +incompatible with a traditional Unix cpp (e.g., it expands ".." into +". .", which breaks relative file names that reference the parent +directory; or inserts TAB characters before lines that set Make +variables). The solution is to make sure the preprocessor is run with the -`-traditional' option. (The `configure' script does that -automatically.) +`-traditional' option. The `configure' script does that automatically +when it detects the known problems in your cpp, but you might hit some +unknown ones. To force the `configure' script to use `-traditional', +run the script like this: + + CPP='gcc -E -traditional" ./configure ... + +(replace the ellipsis "..." with any additional arguments you pass to +the script). Note that this problem does not pertain to the MS-Windows port of Emacs, since it doesn't use the preprocessor to generate Makefiles. -- 2.39.5