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Allow CONFIG_SHELL to override build-time shell in mkheaders

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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 commit is contained in:
Alexandre Oliva 2020-02-20 22:09:03 -03:00 committed by Alexandre Oliva
parent 33fe984aca
commit afbffe0864
2 changed files with 24 additions and 2 deletions
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4
fixincludes/ChangeLog
View File

@ -1,3 +1,7 @@
2020-02-20 Alexandre Oliva <oliva@adacore.com>
* mkheaders.in: Don't require build-time shell on host.
2020-02-13 Matheus Castanho <msc@linux.ibm.com>
* fixinc.in: Skip machine_name fix on powerpc*-*-linux*.

22
fixincludes/mkheaders.in
View File

@ -77,11 +77,29 @@ libexecsubdir=${libexecdir}/gcc/${target_noncanonical}/${version}
itoolsdir=${libexecsubdir}/install-tools
itoolsdatadir=${libsubdir}/install-tools
incdir=${libsubdir}/include-fixed
mkinstalldirs="@SHELL@ ${itoolsdir}/mkinstalldirs"
mkinstalldirs="${itoolsdir}/mkinstalldirs"
cd ${itoolsdir}
rm -rf ${incdir}/*
for shell in $CONFIG_SHELL $SHELL @SHELL@ /bin/sh ""; do
if { test -x $shell || test -x $shell.exe; } \
&& $shell $mkinstalldirs > /dev/null 2>&1; then
mkinstalldirs="$shell $mkinstalldirs"
break
elif test x$shell = x; then
if $mkinstalldirs > /dev/null 2>&1; then
break
elif test ! -f $mkinstalldirs; then
echo mkheaders: could not find $mkinstalldirs >&2
exit 1
else
echo mkheaders: please rerun with CONFIG_SHELL set to a working Bourne shell >&2
exit 1
fi
fi
done
for ml in `cat ${itoolsdatadir}/fixinc_list`; do
sysroot_headers_suffix=`echo ${ml} | sed -e 's/;.*$//'`
multi_dir=`echo ${ml} | sed -e 's/^[^;]*;//'`
@ -91,7 +109,7 @@ for ml in `cat ${itoolsdatadir}/fixinc_list`; do
if [ x${STMP_FIXINC} != x ] ; then
TARGET_MACHINE="${target}" target_canonical="${target}" \
MACRO_LIST="${itoolsdatadir}/macro_list" \
@SHELL@ ./fixinc.sh ${subincdir} \
$shell ./fixinc.sh ${subincdir} \
${isysroot}${SYSTEM_HEADER_DIR} ${OTHER_FIXINCLUDES_DIRS}
rm -f ${subincdir}/syslimits.h
if [ -f ${subincdir}/limits.h ]; then