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97f027ce41
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 <romain.naour@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at https://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches