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. Tested with a x86_64-linux-gnu native, and on various combinations of build, host and targets, including cross and canadian crosses involving host systems that don't have a built-in Bourne Shell. I'm going ahead and checking it in as part of the build machinery, though I acknowledge this might be stretching configury a bit. Please let me know if you have any objections to this stretching, or to the change itself. for fixincludes/ChangeLog * mkheaders.in: Don't require build-time shell on host. --- fixincludes/mkheaders.in | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/fixincludes/mkheaders.in b/fixincludes/mkheaders.in index a293a57..4109dc6 100644 --- a/fixincludes/mkheaders.in +++ b/fixincludes/mkheaders.in @@ -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 -- Alexandre Oliva, freedom fighter he/him https://FSFLA.org/blogs/lxo/ Free Software Evangelist Stallman was right, but he's left :( GNU Toolchain Engineer The darkest places in hell are reserved for those who maintain their neutrality in times of moral crisis. -- Dante Alighieri