https://sourceware.org/bugzilla/show_bug.cgi?id=33397
Bug ID: 33397
Summary: GENSCRIPTS isn't safe for parallel build
Product: binutils
Version: 2.46 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
Makefile.am has
GENSCRIPTS = $(SHELL) $(srcdir)/genscripts.sh "${srcdir}" "${libdir}"
"${prefix}" "${exec_prefix}" @host@ @target@ @target_alias@ "$(GENDEPDIR)"
"${LIB_PATH}" "@EMULATION_LIBPATH@" "@NATIVE_LIB_DIRS@" @use_sysroot@
@enable_initfini_array@
GEN_DEPENDS = $(srcdir)/genscripts.sh ldscripts/stamp
@TDIRS@
e%.c:
$(AM_V_GEN)${GENSCRIPTS} $* "$(tdir_$*)"
With "make -j12 V=1" on Linux/x86-64, I got
test -d ldscripts || mkdir ldscripts; touch ldscripts/stamp
/bin/sh /export/gnu/import/git/sources/binutils-gdb/ld/genscripts.sh
"/export/gnu/import/git/sources/binutils-gdb/ld" "/usr/local/lib" "/usr/local"
"/usr/local" x86_64-pc-linux-gnu x86_64-pc-linux-gnu x86_64-pc-linux-gnu
".deps" "" "elf_x86_64 elf_i386 elf32_x86_64" "/usr/local/lib /lib /usr/lib"
yes yes elf_x86_64 "x86_64-pc-linux-gnu"
/bin/sh /export/gnu/import/git/sources/binutils-gdb/ld/genscripts.sh
"/export/gnu/import/git/sources/binutils-gdb/ld" "/usr/local/lib" "/usr/local"
"/usr/local" x86_64-pc-linux-gnu x86_64-pc-linux-gnu x86_64-pc-linux-gnu
".deps" "" "elf_x86_64 elf_i386 elf32_x86_64" "/usr/local/lib /lib /usr/lib"
yes yes elf32_x86_64 "x86_64-pc-linux-gnu"
/bin/sh /export/gnu/import/git/sources/binutils-gdb/ld/genscripts.sh
"/export/gnu/import/git/sources/binutils-gdb/ld" "/usr/local/lib" "/usr/local"
"/usr/local" x86_64-pc-linux-gnu x86_64-pc-linux-gnu x86_64-pc-linux-gnu
".deps" "" "elf_x86_64 elf_i386 elf32_x86_64" "/usr/local/lib /lib /usr/lib"
yes yes elf_i386 "i386-pc-linux-gnu"
/bin/sh /export/gnu/import/git/sources/binutils-gdb/ld/genscripts.sh
"/export/gnu/import/git/sources/binutils-gdb/ld" "/usr/local/lib" "/usr/local"
"/usr/local" x86_64-pc-linux-gnu x86_64-pc-linux-gnu x86_64-pc-linux-gnu
".deps" "" "elf_x86_64 elf_i386 elf32_x86_64" "/usr/local/lib /lib /usr/lib"
yes yes elf_iamcu "x86_64-pc-linux-gnu"
4 instances of genscripts.sh were run in parallel. On a slow filesystem,
outputs if 4 instances of genscripts.sh may override each other.
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