When compiling an application on Solaris (and AIX) gcc does add implicit -L
options to the linker to point to the location of where libgcc_s.so.1 etc. (I
imagine it does this when a prefix was used that is not in the default ld.so
search path). This results in the LD_RUN_PATH being silently ignored (LIBPATH
on AIX) which is very confusing and can take a long time to find.
It can be easily demonstrated:
f...@neptune:~/gccbug$ gcc -v
Reading specs from /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/specs
Target: sparc-sun-solaris2.8
Configured with: ../sources/gcc-4.0.2/configure --prefix=/opt/csw/gcc4
--with-local-prefix=/opt/csw --without-gnu-as --with-as=/usr/ccs/bin/as
--without-gnu-ld --with-ld=/usr/ccs/bin/ld --enable-threads=posix
--enable-shared --enable-multilib --enable-nls --with-included-gettext
--with-libiconv-prefix=/opt/csw --with-x --enable-java-awt=xlib
--with-system-zlib --enable-languages=c,c++,f95,java,objc,ada
Thread model: posix
gcc version 4.0.2
f...@neptune:~/gccbug$ cat test.c
int main(void) {
return 0;
}
f...@neptune:~/gccbug$ LD_RUN_PATH=/opt/example.com/lib truss -af -t execve gcc
test.c
1563: execve("/opt/csw/gcc4/bin/gcc", 0xFFBFFBE4, 0xFFBFFBF0) argc = 2
1563: argv: gcc test.c
1564: execve("/opt/csw/gcc4/libexec/gcc/sparc-sun-solaris2.8/4.0.2/cc1",
0x0004CE20, 0x00045958) argc = 11
1564: argv: /opt/csw/gcc4/libexec/gcc/sparc-sun-solaris2.8/4.0.2/cc1
1564: -quiet test.c -quiet -dumpbase test.c -mcpu=v7 -auxbase test
1564: -o /var/tmp//cc1uw7s1.s
1566: execve("/usr/ccs/bin/as", 0x0004CE20, 0x00045958) argc = 7
1566: argv: /usr/ccs/bin/as -Qy -s -xarch=v8 -o /var/tmp//ccqjNacX.o
1566: /var/tmp//cc1uw7s1.s
1568: execve("/opt/csw/gcc4/libexec/gcc/sparc-sun-solaris2.8/4.0.2/collect2",
0x0004E248, 0x00045950) argc = 23
1568: argv:
1568: /opt/csw/gcc4/libexec/gcc/sparc-sun-solaris2.8/4.0.2/collect2
1568: -R /opt/csw/gcc4/lib -Y
1568: P,/opt/csw/gcc4/lib:/usr/ccs/lib:/usr/lib -Qy
1568: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crt1.o
1568: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crti.o
1568: /usr/ccs/lib/values-Xa.o
1568: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtbegin.o
1568: -L/opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2
1568: -L/usr/ccs/bin -L/usr/ccs/lib
1568: -L/opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/../../..
1568: /var/tmp//ccqjNacX.o -lgcc -lgcc_eh -lc -lgcc -lgcc_eh -lc
1568: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtend.o
1568: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtn.o
1570: execve("/usr/ccs/bin/ld", 0x0004BE80, 0x0004A44C) argc = 23
1570: argv: /usr/ccs/bin/ld -R /opt/csw/gcc4/lib -Y
1570: P,/opt/csw/gcc4/lib:/usr/ccs/lib:/usr/lib -Qy
1570: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crt1.o
1570: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crti.o
1570: /usr/ccs/lib/values-Xa.o
1570: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtbegin.o
1570: -L/opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2
1570: -L/usr/ccs/bin -L/usr/ccs/lib
1570: -L/opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/../../..
1570: /var/tmp//ccqjNacX.o -lgcc -lgcc_eh -lc -lgcc -lgcc_eh -lc
1570: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtend.o
1570: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtn.o
f...@neptune:~/gccbug$ elfdump -d a.out
Dynamic Section: .dynamic
index tag value
[0] NEEDED 0xd7 libc.so.1
[1] INIT 0x106b4
[2] FINI 0x106d0
[3] RUNPATH 0xed /opt/csw/gcc4/lib
[4] RPATH 0xed /opt/csw/gcc4/lib
[5] HASH 0x100e8
[6] STRTAB 0x102f0
[7] STRSZ 0xff
[8] SYMTAB 0x101a0
[9] SYMENT 0x10
[10] CHECKSUM 0x4a7a
[11] VERNEED 0x103f0
[12] VERNEEDNUM 0x1
[13] PLTRELSZ 0x3c
[14] PLTREL 0x7
[15] JMPREL 0x10440
[16] RELA 0x10410
[17] RELASZ 0x6c
[18] RELAENT 0xc
[19] DEBUG 0
[20] FEATURE_1 0x1 [ PARINIT ]
[21] FLAGS 0 0
[22] FLAGS_1 0 0
[23] PLTGOT 0x20710
[24] NULL 0
f...@neptune:~/gccbug$ truss -af -t execve gcc test.c -R /opt/example.com/lib
1598: execve("/opt/csw/gcc4/bin/gcc", 0xFFBFFBDC, 0xFFBFFBF0) argc = 4
1598: argv: gcc test.c -R /opt/example.com/lib
1599: execve("/opt/csw/gcc4/libexec/gcc/sparc-sun-solaris2.8/4.0.2/cc1",
0x0004CEC8, 0x0004595C) argc = 11
1599: argv: /opt/csw/gcc4/libexec/gcc/sparc-sun-solaris2.8/4.0.2/cc1
1599: -quiet test.c -quiet -dumpbase test.c -mcpu=v7 -auxbase test
1599: -o /var/tmp//cciFstFw.s
1601: execve("/usr/ccs/bin/as", 0x0004CEC8, 0x0004595C) argc = 7
1601: argv: /usr/ccs/bin/as -Qy -s -xarch=v8 -o /var/tmp//ccK8MMUX.o
1601: /var/tmp//cciFstFw.s
1603: execve("/opt/csw/gcc4/libexec/gcc/sparc-sun-solaris2.8/4.0.2/collect2",
0x0004E1C8, 0x00045954) argc = 25
1603: argv:
1603: /opt/csw/gcc4/libexec/gcc/sparc-sun-solaris2.8/4.0.2/collect2
1603: -R /opt/example.com/lib -R /opt/csw/gcc4/lib -Y
1603: P,/opt/csw/gcc4/lib:/usr/ccs/lib:/usr/lib -Qy
1603: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crt1.o
1603: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crti.o
1603: /usr/ccs/lib/values-Xa.o
1603: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtbegin.o
1603: -L/opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2
1603: -L/usr/ccs/bin -L/usr/ccs/lib
1603: -L/opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/../../..
1603: /var/tmp//ccK8MMUX.o -lgcc -lgcc_eh -lc -lgcc -lgcc_eh -lc
1603: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtend.o
1603: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtn.o
1605: execve("/usr/ccs/bin/ld", 0x0004BE80, 0x0004A450) argc = 25
1605: argv: /usr/ccs/bin/ld -R /opt/example.com/lib -R
1605: /opt/csw/gcc4/lib -Y
1605: P,/opt/csw/gcc4/lib:/usr/ccs/lib:/usr/lib -Qy
1605: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crt1.o
1605: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crti.o
1605: /usr/ccs/lib/values-Xa.o
1605: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtbegin.o
1605: -L/opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2
1605: -L/usr/ccs/bin -L/usr/ccs/lib
1605: -L/opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/../../..
1605: /var/tmp//ccK8MMUX.o -lgcc -lgcc_eh -lc -lgcc -lgcc_eh -lc
1605: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtend.o
1605: /opt/csw/gcc4/lib/gcc/sparc-sun-solaris2.8/4.0.2/crtn.o
f...@neptune:~/gccbug$ elfdump -d a.out
Dynamic Section: .dynamic
index tag value
[0] NEEDED 0xd7 libc.so.1
[1] INIT 0x106c8
[2] FINI 0x106e4
[3] RUNPATH 0xed
/opt/example.com/lib:/opt/csw/gcc4/lib
[4] RPATH 0xed
/opt/example.com/lib:/opt/csw/gcc4/lib
[5] HASH 0x100e8
[6] STRTAB 0x102f0
[7] STRSZ 0x114
[8] SYMTAB 0x101a0
[9] SYMENT 0x10
[10] CHECKSUM 0x53a0
[11] VERNEED 0x10404
[12] VERNEEDNUM 0x1
[13] PLTRELSZ 0x3c
[14] PLTREL 0x7
[15] JMPREL 0x10454
[16] RELA 0x10424
[17] RELASZ 0x6c
[18] RELAENT 0xc
[19] DEBUG 0
[20] FEATURE_1 0x1 [ PARINIT ]
[21] FLAGS 0 0
[22] FLAGS_1 0 0
[23] PLTGOT 0x20724
[24] NULL 0
Just like when gcc detect you explicitly pass in -R gcc itself will start using
-R to ld for /opt/csw/gcc4/lib (in this case) it should detect that no -L or -R
option is used by the user and add /opt/csw/gcc4/lib to the LD_RUN_PATH
environment variable instead of using -L and rendering LD_RUN_PATH useless.
--
Summary: LD_RUN_PATH ignored
Product: gcc
Version: 4.0.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: floris dot bruynooghe at gmail dot com
GCC build triplet: sparc-sun-solaris2.8
GCC host triplet: sparc-sun-solaris2.8
GCC target triplet: sparc-sun-solaris2.8
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39785
