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bug#20332: 24.5; With jpeg-6b configure says "WARNING: libjpeg found, bu
From: |
Glenn Morris |
Subject: |
bug#20332: 24.5; With jpeg-6b configure says "WARNING: libjpeg found, but not version 6b or later" |
Date: |
Wed, 15 Apr 2015 13:59:44 -0400 |
User-agent: |
Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/) |
> $ echo 'version 6b or later' > aaa_emacs-24.5.c; cc -E aaa_emacs-24.5.c
> # 1 "aaa_emacs-24.5.c"
> "aaa_emacs-24.5.c", line 1: invalid input token: 6b
> version 6b or later
> #ident "acomp: Sun C 5.9 SunOS_i386 Patch 124868-01 2007/07/12"
> cc: acomp failed for aaa_emacs-24.5.c
> $ echo $?
> 2
Funnily enough, our own etc/PROBLEMS file used to contain a solution for
this very issue:
*** `configure' fails with ``"junk.c", line 660: invalid input token:
8.elc''
The final stage of the Emacs configure process uses the C preprocessor
to generate the Makefiles. Errors of this form can occur if the C
preprocessor inserts extra whitespace into its output. The solution
is to find the switches that stop your preprocessor from inserting extra
whitespace, add them to CPPFLAGS, and re-run configure. For example,
this error can occur on Solaris 10 when using the Sun Studio compiler
``Sun C 5.8'' with its preprocessor CPP="/opt/SUNWspro/bin/cc -E".
The relevant switch in this case is "-Xs" (``compile assuming
(pre-ANSI) K & R C style code'').
And indeed adding -Xs seems to avoid the issue.
I don't think this is a real solution to this case,
just a historical curiosity. :)