From: Thomas Petazzoni Date: Sun, 13 Aug 2017 14:03:20 +0000 (+0200) Subject: ld-elf2flt: behave properly when called with a name different from TARGET_ALIAS X-Git-Url: https://git.wh0rd.org/?a=commitdiff_plain;h=1c9b454336eaf38f7d037917a3120fae04193fbe;p=elf2flt.git ld-elf2flt: behave properly when called with a name different from TARGET_ALIAS ld-elf2flt currently handles two cases: 1 It is called as the wrapper for -ld, generally installed in the bin/ directory of a toolchain. 2 It is called as the wrapper for "ld", generally installed in the TARGET_ALIAS/bin/ directory of a toolchain. Unfortunately, if for some reason it gets called using a FOOBAR-ld name that is different from -ld, it assumes it is in case (2), while it really is in case (1). Due to this, the path mangling logic doesn't work, and it doesn't find ld.real. This happens for example when the binary program in bin/ is named arm-buildroot-uclinux-uclibcgnueabi-ld, but also has a simpler symlink named arm-linux-ld. In this case, arm-buildroot-uclinux-uclibcgnueabi-ld is recognized by ld-elf2flt as containing TARGET_ALIAS, and therefore the proper logic to find ld.real is applied. However, when arm-linux-ld is used, ld-elf2flt doesn't find TARGET_ALIAS, and therefore assumes we're being called as TARGET_ALIAS/bin/ld.. and searches for a program called ld.real in bin/, which doesn't exist. See: $ ./output/host/bin/arm-buildroot-uclinux-uclibcgnueabi-ld /home/thomas/buildroot/buildroot/output/host/bin/../arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: no input files $ ./output/host/bin/arm-linux-ld arm-linux-ld (ld-elf2flt): error trying to exec '/home/thomas/buildroot/buildroot/output/host/bin/ld.real': execvp: No such file or directory $ ./output/host/arm-buildroot-uclinux-uclibcgnueabi/bin/ld /home/thomas/buildroot/buildroot/output/host/arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: no input files This commit fixes that by inverting the logic: if we're being called as just "ld", then we assume it's the program in TARGET_ALIAS/bin/. Otherwise, we're called through some variant of TARGET-ld. Signed-off-by: Thomas Petazzoni --- diff --git a/ld-elf2flt.c b/ld-elf2flt.c index ccb09b5..e5de506 100644 --- a/ld-elf2flt.c +++ b/ld-elf2flt.c @@ -506,15 +506,15 @@ int main(int argc, char *argv[]) the host while those in /lib are for the target. Make bindir point to the bin dir for bin/-foo. Make tooldir point to the bin dir for /bin/foo. */ - if (streqn(elf2flt_progname, TARGET_ALIAS)) { - tmp = concat(argv0_dir, "../" TARGET_ALIAS "/bin", NULL); + if (streqn(elf2flt_progname, "ld")) { + tmp = concat(argv0_dir, "../../bin", NULL); if (stat(tmp, &buf) == 0 && S_ISDIR(buf.st_mode)) { - tooldir = concat(tmp, "/", NULL); + bindir = concat(tmp, "/", NULL); } } else { - tmp = concat(argv0_dir, "../../bin", NULL); + tmp = concat(argv0_dir, "../" TARGET_ALIAS "/bin", NULL); if (stat(tmp, &buf) == 0 && S_ISDIR(buf.st_mode)) { - bindir = concat(tmp, "/", NULL); + tooldir = concat(tmp, "/", NULL); } }