diff options
Diffstat (limited to 'mcon/U/d_gnulibc.U')
| -rw-r--r-- | mcon/U/d_gnulibc.U | 93 |
1 files changed, 69 insertions, 24 deletions
diff --git a/mcon/U/d_gnulibc.U b/mcon/U/d_gnulibc.U index 7cf63ca..ead5dfa 100644 --- a/mcon/U/d_gnulibc.U +++ b/mcon/U/d_gnulibc.U @@ -1,53 +1,98 @@ -?RCS: $Id: d_gnulibc.U,v 3.0.1.1 1997/02/28 15:34:33 ram Exp $ +?RCS: $Id$ ?RCS: -?RCS: Copyright (c) 1996, Andy Dougherty +?RCS: Copyright (c) 1996,1998 Andy Dougherty ?RCS: Copyright (c) 1996, Sven Verdoolaege -?RCS: Copyright (c) 1991-1993, Raphael Manfredi +?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi ?RCS: ?RCS: You may redistribute only under the terms of the Artistic Licence, ?RCS: as specified in the README file that comes with the distribution. ?RCS: You may reuse parts of this distribution only within the terms of ?RCS: that same Artistic Licence; a copy of which may be found at the root -?RCS: of the source tree for dist 3.0. +?RCS: of the source tree for dist 4.0. ?RCS: -?RCS: $Log: d_gnulibc.U,v $ -?RCS: Revision 3.0.1.1 1997/02/28 15:34:33 ram -?RCS: patch61: created -?RCS: -?MAKE:d_gnulibc: Myread Oldconfig Setvar contains rm \ - +cc +ccflags +ldflags +libs +?MAKE:d_gnulibc gnulibc_version: Myread Oldconfig Setvar rm \ + cat Compile run ?MAKE: -pick add $@ %< ?S:d_gnulibc: ?S: Defined if we're dealing with the GNU C Library. ?S:. -?C:HAS_GNULIBC: +?S:gnulibc_version: +?S: This variable contains the version number of the GNU C library. +?S: It is usually something like '2.2.5'. It is a plain '' if this +?S: is not the GNU C library, or if the version is unknown. +?S:. +?C:HAS_GNULIBC ~ %<: ?C: This symbol, if defined, indicates to the C program that -?C: the GNU C library is being used. +?C: the GNU C library is being used. A better check is to use +?C: the __GLIBC__ and __GLIBC_MINOR__ symbols supplied with glibc. ?C:. -?H:#$d_gnulibc HAS_GNULIBC /**/ -?H. +?H:?%<:#$d_gnulibc HAS_GNULIBC /**/ +?H:?%<:#if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE) +?H:?%<:#define _GNU_SOURCE +?H:?%<:#endif +?H:. +?F:!glibc.ver !try.c !try ?LINT: set d_gnulibc -?X: gnulibc can be executed by calling this entry point. +?LINT: usefile try.c +?LINT: known _GNU_SOURCE +?X: gnulibc can be executed by calling __libc_main(). ?X: Ulrich Drepper doesn't think any other libc does that, ?X: but we check if it says 'GNU C Library' to be sure. +?X: +?X: Alas, as of 3/1998 glibc 2.0.7 reportedly isn't going to +?X: have __libc_main() anymore. :-(. Fortunately, all released +?X: versions of glibc 2.x.x _do_ have CPP variables. For 2.0.6, +?X: they are: +?X: #define __GLIBC__ 2 +?X: #define__GLIBC_MINOR__ 0. +?X: (The '6' isn't available :-(. +?X: glibc2.1 will also have +?X: extern const char * __gnu_get_libc_release(void); +?X: extern const char * __gnu_get_libc_version(void); +?X: functions. --thanks to Andreas Jaeger. --AD 6/1998. +?X: Although the exact format isn't documented, __gnu_get_libc_version() +?X: returns a simple string '2.1.3' in glibc 2.1.3. +?X: +: determine whether we are using a GNU C library echo " " echo "Checking for GNU C Library..." >&4 -cat >gnulibc.c <<EOM -int -main() +cat >try.c <<'EOCP' +/* Find out version of GNU C library. __GLIBC__ and __GLIBC_MINOR__ + alone are insufficient to distinguish different versions, such as + 2.0.6 and 2.0.7. The function gnu_get_libc_version() appeared in + libc version 2.1.0. A. Dougherty, June 3, 2002. +*/ +#include <stdio.h> +int main(void) { - return __libc_main(); +#ifdef __GLIBC__ +# ifdef __GLIBC_MINOR__ +# if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1 +# include <gnu/libc-version.h> + printf("%s\n", gnu_get_libc_version()); +# else + printf("%d.%d\n", __GLIBC__, __GLIBC_MINOR__); +# endif +# else + printf("%d\n", __GLIBC__); +# endif + return 0; +#else + return 1; +#endif } -EOM -if $cc $ccflags $ldflags -o gnulibc gnulibc.c $libs >/dev/null 2>&1 && \ - ./gnulibc | $contains '^GNU C Library' >/dev/null 2>&1; then +EOCP +set try +if eval $compile_ok && $run ./try > glibc.ver; then val="$define" - echo "You are using the GNU C Library" + gnulibc_version=`$cat glibc.ver` + echo "You are using the GNU C Library version $gnulibc_version" else val="$undef" + gnulibc_version='' echo "You are not using the GNU C Library" fi -$rm -f gnulibc* +$rm -f try try.* glibc.ver set d_gnulibc eval $setvar |