[Buildroot] [PATCH] package/gcc: fortran support now requires MMU
Thomas Petazzoni via buildroot <[email protected]>
| Newsgroups | net.busybox.buildroot |
|---|---|
| Message-ID | <[email protected]> |
Since upstream commit
c66d1ba685b0d03b28967d2f7a48f6c64687efa2 ("Fortran: Add a shared
memory multi process coarray implementation [PR88076]"), libgfortran
now unconditionally uses fork(), which makes it impossible to build
Fortran support on noMMU architectures.
In follow-up commit efb497c23a6f4109bf8794342617cbc161c08301, it was
made even more clear: if you don't have fork() and you're not on
WIN32:
+#else
+#error "no way known to start child processes."
+#endif
There are apparently no autobuilder failures for this issue, but the
simple defconfig below allows to trigger the build failure:
BR2_arm=y
BR2_cortex_m7=y
BR2_GCC_VERSION_16_X=y
BR2_TOOLCHAIN_BUILDROOT_FORTRAN=y
Even though this issue is only starting from GCC 16.x, we make Fortran
unavailable on noMMU configurations regardless of the GCC version,
with the reasoning that:
1. Fortran on noMMU is unlikely to be in use
2. Moving forward, all future versions of GCC will have this
restriction
Cc: Romain Naour <[email protected]>
Signed-off-by: Thomas Petazzoni <[email protected]>
---
package/gcc/Config.in.host | 2 ++
1 file changed, 2 insertions(+)
diff --git a/package/gcc/Config.in.host b/package/gcc/Config.in.host
index d8b89d942c..bc3223eb59 100644
--- a/package/gcc/Config.in.host
+++ b/package/gcc/Config.in.host
@@ -98,6 +98,8 @@ config BR2_TOOLCHAIN_BUILDROOT_FORTRAN
# on architecture building libquadmath, wchar is required
depends on !BR2_TOOLCHAIN_HAS_LIBQUADMATH || \
(BR2_TOOLCHAIN_HAS_LIBQUADMATH && BR2_USE_WCHAR)
+ # requires fork() since gcc 16.x
+ depends on BR2_USE_MMU
select BR2_TOOLCHAIN_HAS_FORTRAN
help
Enable this option if you want your toolchain to support the
--
2.55.0
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