With LTO, SPL, TPL and VPL are linked through the compiler driver, and GCC's lto-wrapper runs code generation through make. The link recipe is not marked recursive, so make does not pass its jobserver to that command.
With Debian's GCC 12.2 and make 4.3, the SPL link of turris_1x_sdcard, which the next patch switches to LTO, therefore fails at -j8: make[3]: *** write jobserver: Bad file descriptor. Stop. lto-wrapper: fatal error: make returned 2 exit status Prefix the recipe with '+', as the top-level U-Boot link rule does. Tested with Debian's GCC 12.2, where the link now succeeds, and GCC 14.2, where '+' does not change the images of three mpc85xx LTO builds. Signed-off-by: Josef Schlehofer <[email protected]> Cc: Tom Rini <[email protected]> Cc: Simon Glass <[email protected]> Cc: Marek Behún <[email protected]> --- Changes in v2: - shorter commit message With Debian's GCC 14.2.0-19, the link also succeeds without '+' at -j8. The LTO images of turris_1x_sdcard, P2020RDB-PC_NAND and T2080RDB_NAND are identical with and without it. --- scripts/Makefile.xpl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scripts/Makefile.xpl b/scripts/Makefile.xpl index dfd76b51a61..926d762108f 100644 --- a/scripts/Makefile.xpl +++ b/scripts/Makefile.xpl @@ -544,7 +544,7 @@ endif $(obj)/$(SPL_BIN): $(u-boot-spl-platdata) $(u-boot-spl-init) \ $(u-boot-spl-main) $(u-boot-spl-keep-syms-lto) \ $(obj)/u-boot-spl.lds FORCE - $(call if_changed,u-boot-spl) + +$(call if_changed,u-boot-spl) $(sort $(u-boot-spl-init) $(u-boot-spl-main)): $(u-boot-spl-dirs) ; -- 2.54.0 (Apple Git-157)
