diff options
| -rw-r--r-- | CONFORMANCE | 120 | ||||
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | inet/netinet/icmp6.h | 14 | ||||
| -rw-r--r-- | linuxthreads/ChangeLog | 5 | ||||
| -rw-r--r-- | linuxthreads/Examples/ex12.c | 46 | ||||
| -rw-r--r-- | linuxthreads/Makefile | 3 |
6 files changed, 185 insertions, 7 deletions
diff --git a/CONFORMANCE b/CONFORMANCE index 8df261e..bfb8291 100644 --- a/CONFORMANCE +++ b/CONFORMANCE @@ -7,7 +7,7 @@ are presented here. Open Group's hdrchk -------------------- +=================== The hdrchk test suite is available from the Open Group at @@ -48,3 +48,121 @@ struct sigevent { <members> }; include files (namely, putting some of them in gcc-local directory) I copied over the iso646.h, float.h, and stddef.h headers and ignored the problems resulting from the splitted limits.h file). + + +Technical C standards conformance issues in glibc +================================================= + +If you compile programs against glibc with __STRICT_ANSI__ defined +(as, for example, by gcc -ansi, gcc -std=c89, gcc -std=iso1990:199409 +or gcc -std=c99), and use only the headers specified by the version of +the C standard chosen, glibc will attempt to conform to that version +of the C standard (as indicated by __STDC_VERSION__): + +GCC options Standard version +-ansi ISO/IEC 9899:1990 +-std=c89 ISO/IEC 9899:1990 +-std=iso9899:199409 ISO/IEC 9899:1990 as amended by Amd.1:1995 +-std=c99 ISO/IEC 9899:1999 + +(Note that -std=c99 is not available in GCC 2.95.2, and that no +version of GCC presently existing implements the full C99 standard.) + +You may then define additional feature test macros to enable the +features from other standards, and use the headers defined in those +standards (for example, defining _POSIX_C_SOURCE to be 199506L to +enable features from ISO/IEC 9945-1:1996). + +There are some technical ways in which glibc is known not to conform +to the supported versions of the C standard, as detailed below. Some +of these relate to defects in the standard that are expected to be +fixed, or to compiler limitations. + + +Defects in the C99 standard +=========================== + +The definition of macros such as INT8_C in <stdint.h> and <inttypes.h> +is not implementable (Defect Report #209); this is expected to be +fixed in a Technical Corrigendum to make the macros yield a constant +expression of the promoted type (for example, int rather than char) +rather than needing to be able to represent constants of type char. +glibc follows this corrected version. + +Several of the <fenv.h> functions are specified to return void, but +Defect Report #202 points out that under some circumstances they may +need to return an error status. They are expected to be corrected to +return int; glibc follows this corrected specification. + + +Implementation of library functions +=================================== + +The implementation of some library functions does not fully follow the +standard specification: + +C99 added additional forms of floating point constants (hexadecimal +constants, NaNs and infinities) to be recognised by strtod() and +scanf(). The effect is to change the behavior of some strictly +conforming C90 programs; glibc implements the C99 versions only +irrespective of the standard version selected. + +C99 added %a as another scanf format specifier for floating point +values. This conflicts with the glibc extension where %as, %a[ and +%aS mean to allocate the string for the data read. A strictly +conforming C99 program using %as, %a[ or %aS in a scanf format string +will misbehave under glibc. + + +Compiler limitations +==================== + +The macros __STDC_IEC_559__, __STDC_IEC_559_COMPLEX__ and +__STDC_ISO_10646__ are properly supposed to be defined by the +compiler, and to be constant throughout the translation unit (before +and after any library headers are included). However, they mainly +relate to library features, and the necessary magic has yet to be +implemented for GCC to predefine them to the correct values for the +library in use, so glibc defines them in <features.h>. Programs that +test them before including any standard headers may misbehave. + +GCC doesn't support the optional imaginary types. Nor does it +understand the keyword _Complex. This has the corresponding impact on +the relevant headers. + +glibc's use of extern inline conflicts with C99: in C99, extern inline +means that an external definition is generated as well as possibly an +inline definition, but in GCC it means that no external definition is +generated. When GCC's C99 mode implements C99 inline semantics, this +will break the uses of extern inline in glibc's headers. (Actually, +glibc uses `extern __inline', which is beyond the scope of the +standard, but it would clearly be very confusing for `__inline' and +plain `inline' to have different meanings in C99 mode.) + +glibc's <tgmath.h> implementation is arcane but thought to work +correctly; a clean and comprehensible version requires compiler +builtins. + +For most of the headers required of freestanding implementations, +glibc relies on GCC to provide correct versions. (At present, glibc +provides <stdint.h>, and GCC doesn't.) GCC's <float.h> is missing +FLT_EVAL_METHOD and DECIMAL_DIG; glibc instead provides them in +<math.h>, which is not what the standard specifies. GCC's <stdbool.h> +is broken: GCC lacks support for the _Bool type. + +Implementing MATH_ERRNO, MATH_ERREXCEPT and math_errhandling in +<math.h> needs compiler support: see + +http://sources.redhat.com/ml/libc-hacker/2000-06/msg00008.html +http://sources.redhat.com/ml/libc-hacker/2000-06/msg00014.html +http://sources.redhat.com/ml/libc-hacker/2000-06/msg00015.html + + +Issues with headers +=================== + +There are various technical issues with the definitions contained in +glibc's headers. See + +http://sources.redhat.com/ml/libc-alpha/2000-07/msg00259.html +http://sources.redhat.com/ml/libc-alpha/2000-07/msg00279.html @@ -1,3 +1,7 @@ +2000-08-15 Marko Myllynen <myllynen@lut.fi> + + * inet/netinet/icmp6.h: Added Mobile IPv6 definitions. + 2000-08-15 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/powerpc/Dist: Add oldgetrlimit64.c. diff --git a/inet/netinet/icmp6.h b/inet/netinet/icmp6.h index 5a38639..2a31a43 100644 --- a/inet/netinet/icmp6.h +++ b/inet/netinet/icmp6.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc. +/* Copyright (C) 1991,92,93,94,95,96,97,2000 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 @@ -36,18 +36,18 @@ struct icmp6_filter uint32_t data[8]; }; -struct icmp6_hdr +struct icmp6_hdr { uint8_t icmp6_type; /* type field */ uint8_t icmp6_code; /* code field */ uint16_t icmp6_cksum; /* checksum field */ - union + union { uint32_t icmp6_un_data32[1]; /* type-specific field */ uint16_t icmp6_un_data16[2]; /* type-specific field */ uint8_t icmp6_un_data8[4]; /* type-specific field */ } icmp6_dataun; - }; + }; #define icmp6_data32 icmp6_dataun.icmp6_un_data32 #define icmp6_data16 icmp6_dataun.icmp6_un_data16 @@ -135,6 +135,7 @@ struct nd_router_advert /* router advertisement */ #define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1] #define ND_RA_FLAG_MANAGED 0x80 #define ND_RA_FLAG_OTHER 0x40 +#define ND_RA_FLAG_HOME_AGENT 0x20 #define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1] struct nd_neighbor_solicit /* neighbor solicitation */ @@ -177,7 +178,7 @@ struct nd_redirect /* redirect */ struct in6_addr nd_rd_dst; /* destination address */ /* could be followed by options */ }; - + #define nd_rd_type nd_rd_hdr.icmp6_type #define nd_rd_code nd_rd_hdr.icmp6_code #define nd_rd_cksum nd_rd_hdr.icmp6_cksum @@ -195,6 +196,8 @@ struct nd_opt_hdr /* Neighbor discovery option header */ #define ND_OPT_PREFIX_INFORMATION 3 #define ND_OPT_REDIRECTED_HEADER 4 #define ND_OPT_MTU 5 +#define ND_OPT_RTR_ADV_INTERVAL 7 +#define ND_OPT_HOME_AGENT_INFO 8 struct nd_opt_prefix_info /* prefix information */ { @@ -210,6 +213,7 @@ struct nd_opt_prefix_info /* prefix information */ #define ND_OPT_PI_FLAG_ONLINK 0x80 #define ND_OPT_PI_FLAG_AUTO 0x40 +#define ND_OPT_PI_FLAG_RADDR 0x20 struct nd_opt_rd_hdr /* redirected header */ { diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog index 17bd429..187d3a5 100644 --- a/linuxthreads/ChangeLog +++ b/linuxthreads/ChangeLog @@ -1,3 +1,8 @@ +2000-08-15 Ulrich Drepper <drepper@redhat.com> + + * Makefile (tests): Add ex12. Add rule to build it. + * Examples/ex12.c: New file. + 2000-08-13 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/bits/posix_opt.h: Define _POSIX_SEMAPHORES diff --git a/linuxthreads/Examples/ex12.c b/linuxthreads/Examples/ex12.c new file mode 100644 index 0000000..62f2f70 --- /dev/null +++ b/linuxthreads/Examples/ex12.c @@ -0,0 +1,46 @@ +/* Variant of ex6, but this time we use pthread_exit (). */ +#include <errno.h> +#include <stdio.h> +#include <string.h> +#include <pthread.h> +#include <unistd.h> + +void * +test_thread (void *v_param) +{ + pthread_exit (NULL); +} + +int +main (void) +{ + unsigned long count; + + setvbuf (stdout, NULL, _IONBF, 0); + + for (count = 0; count < 2000; ++count) + { + pthread_t thread; + int status; + + status = pthread_create (&thread, NULL, test_thread, NULL); + if (status != 0) + { + printf ("status = %d, count = %lu: %s\n", status, count, + strerror (errno)); + return 1; + } + else + { + printf ("count = %lu\n", count); + } + /* pthread_detach (thread); */ + if (pthread_join (thread, NULL) != 0) + { + printf ("join failed, count %lu\n", count); + return 2; + } + usleep (10); + } + return 0; +} diff --git a/linuxthreads/Makefile b/linuxthreads/Makefile index 15a406e..55174d4 100644 --- a/linuxthreads/Makefile +++ b/linuxthreads/Makefile @@ -41,7 +41,7 @@ nodelete-yes = -Wl,--enable-new-dtags,-z,nodelete LDFLAGS-pthread.so = $(nodelete-$(have-z-nodelete)) vpath %.c Examples -tests = ex1 ex2 ex3 ex4 ex5 ex6 ex7 ex8 ex9 ex10 ex11 joinrace tststack +tests = ex1 ex2 ex3 ex4 ex5 ex6 ex7 ex8 ex9 ex10 ex11 ex12 joinrace tststack include ../Rules @@ -76,5 +76,6 @@ $(objpfx)ex8: $(libpthread) $(objpfx)ex9: $(libpthread) $(objpfx)ex10: $(libpthread) $(librt) $(objpfx)ex11: $(libpthread) $(librt) +$(objpfx)ex12: $(libpthread) $(objpfx)joinrace: $(libpthread) $(objpfx)tststack: $(libpthread) |