Re: [OE-core] [PATCH] libgcc: fix build for baremetal

[Denys Dmytriyenko <denis@denix.org>]

On Wed, Oct 07, 2026 at 03:33:56PM -0500, Ryan Eatmon wrote:
> 
> 
> On 10/7/2026 12:57 AM, Joerg Vehlow via lists.openembedded.org wrote:
> >By removing the erroneous EXTRA_OECONF override in 020d5f0, gcc-cross is now configured with correct sysroot flags, which removes the hosts include directory from the internal paths.
> >This in turn leads to libgcc not finding libc headers (as it should) and breaks libgcc build.
> >In order to fix this, libgcc must be built almost like libgcc-initial.
> >
> >Signed-off-by: Joerg Vehlow <joerg.vehlow@emlix.com>
> >---
> >  meta/recipes-devtools/gcc/libgcc.inc | 10 ++++++++++
> >  1 file changed, 10 insertions(+)
> >
> >diff --git a/meta/recipes-devtools/gcc/libgcc.inc b/meta/recipes-devtools/gcc/libgcc.inc
> >index e92dadf021..93e217f567 100644
> >--- a/meta/recipes-devtools/gcc/libgcc.inc
> >+++ b/meta/recipes-devtools/gcc/libgcc.inc
> >@@ -37,6 +37,16 @@ LICENSE:${PN}-dev = "GPL-3.0-or-later WITH GCC-exception-3.1"
> >  LICENSE:${PN}-dbg = "GPL-3.0-or-later WITH GCC-exception-3.1"
> >  LICENSE:${PN}-src = "GPL-3.0-or-later WITH GCC-exception-3.1"
> >+# On baremetal there is no libc:
> >+# configure need limits.h for its sanity check
> >+# libc dependencies have to be patched out just like in libgcc-initial
> >+do_configure:prepend:libc-baremetal () {
> >+	install -d ${STAGING_INCDIR}
> >+	touch ${STAGING_INCDIR}/limits.h
> >+	sed -i -e 's#INHIBIT_LIBC_CFLAGS =.*#INHIBIT_LIBC_CFLAGS = -Dinhibit_libc#' ${B}/gcc/libgcc.mvars
> >+	sed -i -e 's#inhibit_libc = false#inhibit_libc = true#' ${B}/gcc/Makefile
> >+}
> >+
> >  FILES:${PN}-dev = "\
> >      ${base_libdir}/libgcc*.so \
> >      ${@oe.utils.conditional('BASETARGET_SYS', '${TARGET_SYS}', '', '${libdir}/${BASETARGET_SYS}', d)} \
> 
> 
> This does fix our build issue.  So it should be safe to pick up this
> patch and not revert the original change.

Yes, I can confirm this change fixes all my other test builds for this issue.

-- 
Denys