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sys-devel/gdb: fix cross build issues with configuring gmp libs

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As gdb 11 or newer requires gmp libs as dependency, a cross build of
gdb 11.2 started to fail when its configure scripts try to detect if
gmp exists.  The failure occurs mainly because the build still passes
'-L/usr/lib64` to LDFLAGS. Let's say, for example, host toolchains
outside of sysroot have amd64 libs, while the target inside of
sysroot should have arm64 libs. However, configure scripts of gdb 11.2
still try to find its libs outside of sysroot, /usr/lib64, although it
should find its libs inside of sysroot, e.g. /build/arm64/usr/lib64.

To fix the cross build issues, pass --with-sysroot as well as --libdir,
correctly with ${ESYSROOT}.

As a side note, for some reason, upstream gdb configure scripts are not
able to correctly make use of its gmp-specific options like --with-gmp
or --with-gmp-lib. Passing those options does not bring anything.
Also configure must have both --with-sysroot and --libdir, to make the
build work.
This commit is contained in:
Dongsu Park 2022-06-13 14:39:19 +02:00
parent 416e41b2c3
commit 47e5c0d929
1 changed files with 9 additions and 0 deletions
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9
sdk_container/src/third_party/coreos-overlay/sys-devel/gdb/gdb-11.2.ebuild vendored
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@ -154,6 +154,15 @@ src_configure() {
# Ideally we would like automagic-or-disabled here. # Ideally we would like automagic-or-disabled here.
# But the check does not quite work on i686: bug #760926. # But the check does not quite work on i686: bug #760926.
$(use_enable cet) $(use_enable cet)
# Flatcar: we need to set both configure options, --with-sysroot
# and --libdir, to fix cross build issues that happen when
# configuring gmp. We explicitly need --libdir. Having only
# --with-sysroot without --libdir would not fix the build issues.
# For some reason, it is not enough to set only --with-sysroot,
# also not enough to pass --with-gmp-xxx options.
--with-sysroot="${ESYSROOT}"
--libdir="${ESYSROOT}/usr/$(get_libdir)"
) )
local sysroot="${EPREFIX}/usr/${CTARGET}" local sysroot="${EPREFIX}/usr/${CTARGET}"