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ld: make ELF binaries with no shared library dependencies static binaries

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$ file $GOROOT/bin/{godoc,goyacc}
/home/rsc/g/go/bin/godoc:  ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), not strpped
/home/rsc/g/go/bin/goyacc: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, not stripped
$

Fixes #1758.

R=iant
CC=golang-dev
https://golang.org/cl/4428079
This commit is contained in:
Russ Cox 2011-05-03 01:56:23 -04:00
parent a3baf7f90e
commit 296d6871a8
3 changed files with 15 additions and 0 deletions
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2
src/cmd/ld/go.c
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@ -454,6 +454,7 @@ loaddynimport(char *file, char *pkg, char *p, int n)
if(strcmp(name, "_") == 0 && strcmp(def, "_") == 0) {
// allow #pragma dynimport _ _ "foo.so"
// to force a link of foo.so.
havedynamic = 1;
adddynlib(lib);
continue;
}
@ -468,6 +469,7 @@ loaddynimport(char *file, char *pkg, char *p, int n)
s->dynimpname = def;
s->dynimpvers = q;
s->type = SDYNIMPORT;
havedynamic = 1;
}
}
return;

12
src/cmd/ld/lib.c
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@ -259,6 +259,18 @@ loadlib(void)
Bprint(&bso, "%5.2f autolib: %s (from %s)\n", cputime(), library[i].file, library[i].objref);
objfile(library[i].file, library[i].pkg);
}
// We've loaded all the code now.
// If there are no dynamic libraries needed, gcc disables dynamic linking.
// Because of this, glibc's dynamic ELF loader occasionally (like in version 2.13)
// assumes that a dynamic binary always refers to at least one dynamic library.
// Rather than be a source of test cases for glibc, disable dynamic linking
// the same way that gcc would.
//
// Exception: on OS X, programs such as Shark only work with dynamic
// binaries, so leave it enabled on OS X (Mach-O) binaries.
if(!havedynamic && HEADTYPE != Hdarwin)
debug['d'] = 1;
}
/*

1
src/cmd/ld/lib.h
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@ -122,6 +122,7 @@ EXTERN char* outfile;
EXTERN int32 nsymbol;
EXTERN char* thestring;
EXTERN int ndynexp;
EXTERN int havedynamic;
EXTERN Segment segtext;
EXTERN Segment segdata;