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Index: binutils.git/ld/ldmain.c
===================================================================
--- binutils.git.orig/ld/ldmain.c
+++ binutils.git/ld/ldmain.c
@@ -49,6 +49,7 @@
#endif
#include <string.h>
+#include <errno.h>
#ifndef TARGET_SYSTEM_ROOT
#define TARGET_SYSTEM_ROOT ""
@@ -187,9 +188,35 @@ ld_bfd_error_handler (const char *fmt, v
(*default_bfd_error_handler) (fmt, ap);
}
+static void
+maybe_altexec(char **argv)
+{
+ char *LD_ALTEXEC;
+
+ /* If LD_ALTEXEC is not set or is empty, just return */
+ LD_ALTEXEC = getenv("LD_ALTEXEC");
+ if (LD_ALTEXEC == NULL)
+ return;
+
+ if (*LD_ALTEXEC == '\0')
+ return;
+
+ /* Unset LD_ALTEXEC for case when it points to this program itself ;-) */
+ if (unsetenv("LD_ALTEXEC"))
+ exit(errno);
+
+ argv[0] = LD_ALTEXEC;
+ execvp(LD_ALTEXEC, argv);
+
+ /* We are here only if execvp() failed */
+ exit(errno);
+}
+
int
main (int argc, char **argv)
{
+ maybe_altexec(argv);
+
char *emulation;
long start_time = get_run_time ();
Index: binutils.git/ld/ld.info
===================================================================
--- binutils.git.orig/ld/ld.info
+++ binutils.git/ld/ld.info
@@ -2546,7 +2546,7 @@ File: ld.info, Node: Environment, Prev
=========================
You can change the behaviour of 'ld' with the environment variables
-'GNUTARGET', 'LDEMULATION' and 'COLLECT_NO_DEMANGLE'.
+'GNUTARGET', 'LDEMULATION', 'COLLECT_NO_DEMANGLE', and 'LD_ALTEXEC'.
'GNUTARGET' determines the input-file object format if you don't use
'-b' (or its synonym '--format'). Its value should be one of the BFD
@@ -2574,6 +2574,11 @@ not demangling symbols. This environmen
fashion by the 'gcc' linker wrapper program. The default may be
overridden by the '--demangle' and '--no-demangle' options.
+ 'LD_ALTEXEC' sets alternative linker. The linker executes,
+and passes control to this alternative linker. For instance one
+can set 'LD_ALTEXEC=echo' to debug linker command line.
+
+
File: ld.info, Node: Scripts, Next: Machine Dependent, Prev: Invocation, Up: Top
|
