diff options
Diffstat (limited to 'sysdeps/s390')
| -rw-r--r-- | sysdeps/s390/Versions | 6 | ||||
| -rw-r--r-- | sysdeps/s390/dl-tls.h | 73 | ||||
| -rw-r--r-- | sysdeps/s390/libc-tls.c | 37 | ||||
| -rw-r--r-- | sysdeps/s390/s390-32/dl-machine.h | 92 | ||||
| -rw-r--r-- | sysdeps/s390/s390-32/elf/configure | 52 | ||||
| -rw-r--r-- | sysdeps/s390/s390-32/elf/configure.in | 37 | ||||
| -rw-r--r-- | sysdeps/s390/s390-64/dl-machine.h | 92 | ||||
| -rw-r--r-- | sysdeps/s390/s390-64/elf/configure | 52 | ||||
| -rw-r--r-- | sysdeps/s390/s390-64/elf/configure.in | 37 |
9 files changed, 460 insertions, 18 deletions
diff --git a/sysdeps/s390/Versions b/sysdeps/s390/Versions new file mode 100644 index 0000000..7136af2 --- /dev/null +++ b/sysdeps/s390/Versions @@ -0,0 +1,6 @@ +ld { + GLIBC_2.3 { + # runtime interface to TLS + __tls_get_offset; + } +}
\ No newline at end of file diff --git a/sysdeps/s390/dl-tls.h b/sysdeps/s390/dl-tls.h new file mode 100644 index 0000000..fbd85c1 --- /dev/null +++ b/sysdeps/s390/dl-tls.h @@ -0,0 +1,73 @@ +/* Thread-local storage handling in the ELF dynamic linker. s390 version. + Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + + +/* Type used for the representation of TLS information in the GOT. */ +typedef struct +{ + unsigned long int ti_module; + unsigned long int ti_offset; +} tls_index; + + +#ifdef SHARED +/* This is the prototype for the GNU version. */ +extern void *__tls_get_addr (tls_index *ti) attribute_hidden; +extern unsigned long __tls_get_offset (unsigned long got_offset); + +/* The special thing about the s390 TLS ABI is that we do not have the + standard __tls_get_addr function but the __tls_get_offset function + which differs in two important aspects: + 1) __tls_get_offset gets a got offset instead of a pointer to the + tls_index structure + 2) __tls_get_offset returns the offset of the requested variable to + the thread descriptor instead of a pointer to the variable. + */ +#if defined __s390x__ +asm("\n\ + .text\n\ + .globl __tls_get_offset\n\ + .type __tls_get_offset, @function\n\ + .align 4\n\ +__tls_get_offset:\n\ + la %r2,0(%r2,%r12)\n\ + jg __tls_get_addr\n\ +"); +#elif defined __s390__ +asm("\n\ + .text\n\ + .globl __tls_get_offset\n\ + .type __tls_get_offset, @function\n\ + .align 4\n\ +__tls_get_offset:\n\ + basr %r3,0\n\ +0: la %r2,0(%r2,%r12)\n\ + l %r4,1f-0b(%r3)\n\ + b 0(%r4,%r3)\n\ +1: .long __tls_get_addr - 0b\n\ +"); +#endif + +#define GET_ADDR_OFFSET \ + (ti->ti_offset - (unsigned long) __builtin_thread_pointer ()) + +#define __TLS_GET_ADDR(__ti) \ + (__tls_get_addr(__ti) + (unsigned long) __builtin_thread_pointer ()) + +#endif diff --git a/sysdeps/s390/libc-tls.c b/sysdeps/s390/libc-tls.c new file mode 100644 index 0000000..bc433f8 --- /dev/null +++ b/sysdeps/s390/libc-tls.c @@ -0,0 +1,37 @@ +/* Thread-local storage handling in the ELF dynamic linker. IA-64 version. + Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdeps/generic/libc-tls.c> + +#if USE_TLS + +/* On s390, the literal pool entry that refers to __tls_get_offset + is not removed, even if all branches that use the literal pool + entry gets removed by TLS optimizations. To get binaries + statically linked __tls_get_offset is defined here but + aborts if it is used. */ + +void * +__tls_get_offset (size_t m, size_t offset) +{ + abort (); +} + +#endif + diff --git a/sysdeps/s390/s390-32/dl-machine.h b/sysdeps/s390/s390-32/dl-machine.h index 557c04e..6905814 100644 --- a/sysdeps/s390/s390-32/dl-machine.h +++ b/sysdeps/s390/s390-32/dl-machine.h @@ -1,5 +1,5 @@ /* Machine-dependent ELF dynamic relocation inline functions. S390 Version. - Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc. + Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc. Contributed by Carl Pederson & Martin Schwidefsky. This file is part of the GNU C Library. @@ -312,13 +312,22 @@ _dl_start_user:\n\ #define RTLD_START_SPECIAL_INIT /* nothing */ #endif -/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so - PLT entries should not be allowed to define the value. +/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or + TLS variable, so undefined references should not be allowed to + define the value. ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one of the main executable's symbols, as for a COPY reloc. */ -#define elf_machine_type_class(type) \ +#ifdef USE_TLS +# define elf_machine_type_class(type) \ + ((((type) == R_390_JMP_SLOT || (type) == R_390_TLS_DTPMOD \ + || (type) == R_390_TLS_DTPOFF || (type) == R_390_TLS_TPOFF) \ + * ELF_RTYPE_CLASS_PLT) \ + | (((type) == R_390_COPY) * ELF_RTYPE_CLASS_COPY)) +#else +# define elf_machine_type_class(type) \ ((((type) == R_390_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \ | (((type) == R_390_COPY) * ELF_RTYPE_CLASS_COPY)) +#endif /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_390_JMP_SLOT @@ -372,25 +381,90 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc, { const unsigned int r_type = ELF32_R_TYPE (reloc->r_info); +#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC if (__builtin_expect (r_type == R_390_RELATIVE, 0)) - *reloc_addr = map->l_addr + reloc->r_addend; -#ifndef RTLD_BOOTSTRAP - else if (__builtin_expect (r_type == R_390_NONE, 0)) - return; + { +# if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC + /* This is defined in rtld.c, but nowhere in the static libc.a; + make the reference weak so static programs can still link. + This declaration cannot be done when compiling rtld.c + (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the + common defn for _dl_rtld_map, which is incompatible with a + weak decl in the same file. */ +# ifndef SHARED + weak_extern (GL(dl_rtld_map)); +# endif + if (map != &GL(dl_rtld_map)) /* Already done in rtld itself. */ +# endif + *reloc_addr = map->l_addr + reloc->r_addend; + } + else #endif + if (__builtin_expect (r_type == R_390_NONE, 0)) + return; else { const Elf32_Sym *const refsym = sym; +#if defined USE_TLS && !defined RTLD_BOOTSTRAP + struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type); + Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value; +#else Elf32_Addr value = RESOLVE (&sym, version, r_type); + +# ifndef RTLD_BOOTSTRAP if (sym) +# endif value += sym->st_value; +#endif /* use TLS and !RTLD_BOOTSTRAP */ switch (r_type) { case R_390_GLOB_DAT: case R_390_JMP_SLOT: - *reloc_addr = value; + *reloc_addr = value + reloc->r_addend; + break; + +#if defined USE_TLS && (!defined RTLD_BOOTSTRAP || USE___THREAD) + case R_390_TLS_DTPMOD: +# ifdef RTLD_BOOTSTRAP + /* During startup the dynamic linker is always the module + with index 1. + XXX If this relocation is necessary move before RESOLVE + call. */ + *reloc_addr = 1; +# else + /* Get the information from the link map returned by the + resolv function. */ + if (sym_map != NULL) + *reloc_addr = sym_map->l_tls_modid; +# endif + break; + case R_390_TLS_DTPOFF: +# ifndef RTLD_BOOTSTRAP + /* During relocation all TLS symbols are defined and used. + Therefore the offset is already correct. */ + if (sym != NULL) + *reloc_addr = sym->st_value + reloc->r_addend; +# endif break; + case R_390_TLS_TPOFF: + /* The offset is negative, forward from the thread pointer. */ +# ifdef RTLD_BOOTSTRAP + *reloc_addr = sym->st_value + reloc->r_addend - map->l_tls_offset; +# else + /* We know the offset of the object the symbol is contained in. + It is a negative value which will be added to the + thread pointer. */ + if (sym != NULL) + { + CHECK_STATIC_TLS (map, sym_map); + *reloc_addr = (sym->st_value + reloc->r_addend + - sym_map->l_tls_offset); + } +#endif + break; +#endif /* use TLS */ + #ifndef RTLD_BOOTSTRAP case R_390_COPY: if (sym == NULL) diff --git a/sysdeps/s390/s390-32/elf/configure b/sysdeps/s390/s390-32/elf/configure new file mode 100644 index 0000000..64eff1f --- /dev/null +++ b/sysdeps/s390/s390-32/elf/configure @@ -0,0 +1,52 @@ +# This file is generated from configure.in by Autoconf. DO NOT EDIT! + # Local configure fragment for sysdeps/s390/elf. + +if test "$usetls" != no; then +# Check for support of thread-local storage handling in assembler and +# linker. +echo "$as_me:$LINENO: checking for s390 TLS support" >&5 +echo $ECHO_N "checking for s390 TLS support... $ECHO_C" >&6 +if test "${libc_cv_390_tls+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat > conftest.s <<\EOF + .section ".tdata", "awT", @progbits +foo: .long 25 + .text + .long foo@TLSGD + .long foo@TLSLDM + .long foo@DTPOFF + .long foo@NTPOFF + .long foo@GOTNTPOFF + .long foo@INDNTPOFF + l %r1,foo@GOTNTPOFF(%r12) + l %r1,0(%r1):tls_load:foo + bas %r14,0(%r1,%r13):tls_gdcall:foo + bas %r14,0(%r1,%r13):tls_ldcall:foo +EOF +if { ac_try='${CC-cc} -c $CFLAGS conftest.s 1>&5' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + libc_cv_390_tls=yes +else + libc_cv_390_tls=no +fi +rm -f conftest* +fi +echo "$as_me:$LINENO: result: $libc_cv_390_tls" >&5 +echo "${ECHO_T}$libc_cv_390_tls" >&6 +if test $libc_cv_390_tls = yes; then + cat >>confdefs.h <<\_ACEOF +#define HAVE_TLS_SUPPORT 1 +_ACEOF + +fi +fi + +cat >>confdefs.h <<\_ACEOF +#define PI_STATIC_AND_HIDDEN 1 +_ACEOF + diff --git a/sysdeps/s390/s390-32/elf/configure.in b/sysdeps/s390/s390-32/elf/configure.in new file mode 100644 index 0000000..fcf9329 --- /dev/null +++ b/sysdeps/s390/s390-32/elf/configure.in @@ -0,0 +1,37 @@ +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. +# Local configure fragment for sysdeps/s390/elf. + +if test "$usetls" != no; then +# Check for support of thread-local storage handling in assembler and +# linker. +AC_CACHE_CHECK(for s390 TLS support, libc_cv_390_tls, [dnl +cat > conftest.S <<\EOF + .section ".tdata", "awT", @progbits +foo: .long 25 + .text + .long foo@TLSGD + .long foo@TLSLDM + .long foo@DTPOFF + .long foo@NTPOFF + .long foo@GOTNTPOFF + .long foo@INDNTPOFF + l %r1,foo@GOTNTPOFF(%r12) + l %r1,0(%r1):tls_load:foo + bas %r14,0(%r1,%r13):tls_gdcall:foo + bas %r14,0(%r1,%r13):tls_ldcall:foo +EOF +dnl +if AC_TRY_COMMAND(${CC-cc} -S $CFLAGS conftest.S 1>&AS_MESSAGE_LOG_FD); then + libc_cv_390_tls=yes +else + libc_cv_390_tls=no +fi +rm -f conftest*]) +if test $libc_cv_390_tls = yes; then + AC_DEFINE(HAVE_TLS_SUPPORT) +fi +fi + +dnl It is always possible to access static and hidden symbols in an +dnl position independent way. +AC_DEFINE(PI_STATIC_AND_HIDDEN) diff --git a/sysdeps/s390/s390-64/dl-machine.h b/sysdeps/s390/s390-64/dl-machine.h index a4033ee..e7ae3f7 100644 --- a/sysdeps/s390/s390-64/dl-machine.h +++ b/sysdeps/s390/s390-64/dl-machine.h @@ -1,6 +1,6 @@ /* Machine-dependent ELF dynamic relocation inline functions. 64 bit S/390 Version. - Copyright (C) 2001, 2002 Free Software Foundation, Inc. + Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc. Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). This file is part of the GNU C Library. @@ -284,13 +284,22 @@ _dl_start_user:\n\ #define RTLD_START_SPECIAL_INIT /* nothing */ #endif -/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so - PLT entries should not be allowed to define the value. +/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or + TLS variable, so undefined references should not be allowed to + define the value. ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one of the main executable's symbols, as for a COPY reloc. */ -#define elf_machine_type_class(type) \ +#ifdef USE_TLS +# define elf_machine_type_class(type) \ + ((((type) == R_390_JMP_SLOT || (type) == R_390_TLS_DTPMOD \ + || (type) == R_390_TLS_DTPOFF || (type) == R_390_TLS_TPOFF) \ + * ELF_RTYPE_CLASS_PLT) \ + | (((type) == R_390_COPY) * ELF_RTYPE_CLASS_COPY)) +#else +# define elf_machine_type_class(type) \ ((((type) == R_390_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \ | (((type) == R_390_COPY) * ELF_RTYPE_CLASS_COPY)) +#endif /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_390_JMP_SLOT @@ -340,18 +349,41 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc, { const unsigned int r_type = ELF64_R_TYPE (reloc->r_info); +#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC if (__builtin_expect (r_type == R_390_RELATIVE, 0)) - *reloc_addr = map->l_addr + reloc->r_addend; -#ifndef RTLD_BOOTSTRAP - else if (__builtin_expect (r_type == R_390_NONE, 0)) - return; + { +# if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC + /* This is defined in rtld.c, but nowhere in the static libc.a; + make the reference weak so static programs can still link. + This declaration cannot be done when compiling rtld.c + (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the + common defn for _dl_rtld_map, which is incompatible with a + weak decl in the same file. */ +# ifndef SHARED + weak_extern (GL(dl_rtld_map)); +# endif + if (map != &GL(dl_rtld_map)) /* Already done in rtld itself. */ +# endif + *reloc_addr = map->l_addr + reloc->r_addend; + } + else #endif + if (__builtin_expect (r_type == R_390_NONE, 0)) + return; else { const Elf64_Sym *const refsym = sym; +#if defined USE_TLS && !defined RTLD_BOOTSTRAP + struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type); + Elf64_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value; +#else Elf64_Addr value = RESOLVE (&sym, version, r_type); + +# ifndef RTLD_BOOTSTRAP if (sym) +# endif value += sym->st_value; +#endif /* use TLS and !RTLD_BOOTSTRAP */ switch (r_type) { @@ -359,6 +391,48 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc, case R_390_JMP_SLOT: *reloc_addr = value + reloc->r_addend; break; + +#if defined USE_TLS && (!defined RTLD_BOOTSTRAP || USE___THREAD) + case R_390_TLS_DTPMOD: +# ifdef RTLD_BOOTSTRAP + /* During startup the dynamic linker is always the module + with index 1. + XXX If this relocation is necessary move before RESOLVE + call. */ + *reloc_addr = 1; +# else + /* Get the information from the link map returned by the + resolv function. */ + if (sym_map != NULL) + *reloc_addr = sym_map->l_tls_modid; +# endif + break; + case R_390_TLS_DTPOFF: +# ifndef RTLD_BOOTSTRAP + /* During relocation all TLS symbols are defined and used. + Therefore the offset is already correct. */ + if (sym != NULL) + *reloc_addr = sym->st_value + reloc->r_addend; +# endif + break; + case R_390_TLS_TPOFF: + /* The offset is negative, forward from the thread pointer. */ +# ifdef RTLD_BOOTSTRAP + *reloc_addr = sym->st_value + reloc->r_addend - map->l_tls_offset; +# else + /* We know the offset of the object the symbol is contained in. + It is a negative value which will be added to the + thread pointer. */ + if (sym != NULL) + { + CHECK_STATIC_TLS (map, sym_map); + *reloc_addr = (sym->st_value + reloc->r_addend + - sym_map->l_tls_offset); + } +#endif + break; +#endif /* use TLS */ + #ifndef RTLD_BOOTSTRAP case R_390_COPY: if (sym == NULL) @@ -439,7 +513,7 @@ elf_machine_lazy_rel (struct link_map *map, Elf64_Addr l_addr, const Elf64_Rela *reloc) { Elf64_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset); - const unsigned int r_type = ELF32_R_TYPE (reloc->r_info); + const unsigned int r_type = ELF64_R_TYPE (reloc->r_info); /* Check for unexpected PLT reloc type. */ if (__builtin_expect (r_type == R_390_JMP_SLOT, 1)) { diff --git a/sysdeps/s390/s390-64/elf/configure b/sysdeps/s390/s390-64/elf/configure new file mode 100644 index 0000000..42fc6e6 --- /dev/null +++ b/sysdeps/s390/s390-64/elf/configure @@ -0,0 +1,52 @@ +# This file is generated from configure.in by Autoconf. DO NOT EDIT! + # Local configure fragment for sysdeps/s390/elf. + +if test "$usetls" != no; then +# Check for support of thread-local storage handling in assembler and +# linker. +echo "$as_me:$LINENO: checking for s390 TLS support" >&5 +echo $ECHO_N "checking for s390 TLS support... $ECHO_C" >&6 +if test "${libc_cv_390_tls+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat > conftest.s <<\EOF + .section ".tdata", "awT", @progbits +foo: .long 25 + .text + .quad foo@TLSGD + .quad foo@TLSLDM + .quad foo@DTPOFF + .quad foo@NTPOFF + .quad foo@GOTNTPOFF + .quad foo@INDNTPOFF + lg %r1,foo@GOTNTPOFF(%r12) + lg %r1,0(%r1):tls_load:foo + brasl %r14,__tls_get_offset@plt:tls_gdcall:foo + brasl %r14,__tls_get_offset@plt:tls_ldcall:foo +EOF +if { ac_try='${CC-cc} -c $CFLAGS conftest.s 1>&5' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + libc_cv_390_tls=yes +else + libc_cv_390_tls=no +fi +rm -f conftest* +fi +echo "$as_me:$LINENO: result: $libc_cv_390_tls" >&5 +echo "${ECHO_T}$libc_cv_390_tls" >&6 +if test $libc_cv_390_tls = yes; then + cat >>confdefs.h <<\_ACEOF +#define HAVE_TLS_SUPPORT 1 +_ACEOF + +fi +fi + +cat >>confdefs.h <<\_ACEOF +#define PI_STATIC_AND_HIDDEN 1 +_ACEOF + diff --git a/sysdeps/s390/s390-64/elf/configure.in b/sysdeps/s390/s390-64/elf/configure.in new file mode 100644 index 0000000..ac953fc --- /dev/null +++ b/sysdeps/s390/s390-64/elf/configure.in @@ -0,0 +1,37 @@ +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. +# Local configure fragment for sysdeps/s390/elf. + +if test "$usetls" != no; then +# Check for support of thread-local storage handling in assembler and +# linker. +AC_CACHE_CHECK(for s390 TLS support, libc_cv_390_tls, [dnl +cat > conftest.S <<\EOF + .section ".tdata", "awT", @progbits +foo: .long 25 + .text + .quad foo@TLSGD + .quad foo@TLSLDM + .quad foo@DTPOFF + .quad foo@NTPOFF + .quad foo@GOTNTPOFF + .quad foo@INDNTPOFF + lg %r1,foo@GOTNTPOFF(%r12) + lg %r1,0(%r1):tls_load:foo + brasl %r14,__tls_get_offset@plt:tls_gdcall:foo + brasl %r14,__tls_get_offset@plt:tls_ldcall:foo +EOF +dnl +if AC_TRY_COMMAND(${CC-cc} -S $CFLAGS conftest.S 1>&AS_MESSAGE_LOG_FD); then + libc_cv_390_tls=yes +else + libc_cv_390_tls=no +fi +rm -f conftest*]) +if test $libc_cv_390_tls = yes; then + AC_DEFINE(HAVE_TLS_SUPPORT) +fi +fi + +dnl It is always possible to access static and hidden symbols in an +dnl position independent way. +AC_DEFINE(PI_STATIC_AND_HIDDEN) |