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mkheaders.in uses substitutions of @SHELL@ to run fixinc.sh and mkinstalldirs. Problem is, SHELL comes from CONFIG_SHELL for the build system, and it needs not match whatever is available at an unrelated host system after installation, when mkheaders is supposed to be run. I considered ditching the hardcoding altogether, but decided to retain it, but allowing CONFIG_SHELL and SHELL to override it, if any of them can successfully run mkinstalldirs, and if those and the substituted @SHELL@ fail, fallback to /bin/sh and to plain execution of the script, which appears to enable at least one shell on a system that doesn't typicall have a shell to recognize a script by #!/bin/sh and reinvoke itself to run it. If all of these fail, we fail, but only after telling the user to retry after setting CONFIG_SHELL, that fixincl itself also uses. for fixincludes/ChangeLog * mkheaders.in: Don't require build-time shell on host.
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.