From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2793 invoked by alias); 8 Apr 2014 17:54:12 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 2762 invoked by uid 48); 8 Apr 2014 17:54:08 -0000 From: "david.abdurachmanov at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/60789] New: [4.9 Regression] Missing -lm while checking for math functions (e.g., atan2f) Date: Tue, 08 Apr 2014 17:54:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Version: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: david.abdurachmanov at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-04/txt/msg00578.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60789 Bug ID: 60789 Summary: [4.9 Regression] Missing -lm while checking for math functions (e.g., atan2f) Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: david.abdurachmanov at gmail dot com Math functions tests are failing with GCC 4.9.0 (trunk, r209221), while working fine at least up to 4.8.1. Tested on x86_64 (Scientific Linux 6.5) and aarch64 (Fedora 19). Looking at compile time, seems that `-lm` was lost. This caused a number of _GLIBCXX_HAVE_* not being defined for math functions in `c++config.h`, thus causes functions like `atan2f` to call `(float)atan2(x, y)`. ##### Fragment from ./x86_64-unknown-linux-gnu/libstdc++-v3/config.log, GCC 4.8.1, checking for `atan2f`. configure:22347: checking for atan2f declaration configure:22372: /build1/davidlt/gcc421diff/a/BUILD/slc6_amd64_gcc481/external/gcc/4.8.1-cms/gcc-gcc-4_8-branch-199526/obj/./gcc/xgcc -shared-libgcc -B/build1/davidlt/gcc421diff/a/BUILD/slc6_amd64_gcc481/external/gcc/4.8.1-cms/gcc-gcc-4_8-branch-199526/obj/./gcc -nostdinc++ -L/build1/davidlt/gcc421diff/a/BUILD/slc6_amd64_gcc481/external/gcc/4.8.1-cms/gcc-gcc-4_8-branch-199526/obj/x86_64-redhat-linux-gnu/libstdc++-v3/src -L/build1/davidlt/gcc421diff/a/BUILD/slc6_amd64_gcc481/external/gcc/4.8.1-cms/gcc-gcc-4_8-branch-199526/obj/x86_64-redhat-linux-gnu/libstdc++-v3/src/.libs -B/build1/davidlt/gcc421diff/a/tmp/BUILDROOT/abdabd72f629a2521d29cea96ef20750/opt/cmssw/slc6_amd64_gcc481/external/gcc/4.8.1-cms/x86_64-redhat-linux-gnu/bin/ -B/build1/davidlt/gcc421diff/a/tmp/BUILDROOT/abdabd72f629a2521d29cea96ef20750/opt/cmssw/slc6_amd64_gcc481/external/gcc/4.8.1-cms/x86_64-redhat-linux-gnu/lib/ -isystem /build1/davidlt/gcc421diff/a/tmp/BUILDROOT/abdabd72f629a2521d29cea96ef20750/opt/cmssw/slc6_amd64_gcc481/external/gcc/4.8.1-cms/x86_64-redhat-linux-gnu/include -isystem /build1/davidlt/gcc421diff/a/tmp/BUILDROOT/abdabd72f629a2521d29cea96ef20750/opt/cmssw/slc6_amd64_gcc481/external/gcc/4.8.1-cms/x86_64-redhat-linux-gnu/sys-include -c -fno-builtin -D_GNU_SOURCE conftest.cpp >&5 configure:22372: $? = 0 configure:22388: result: yes configure:22394: checking for atan2f configure:22394: /build1/davidlt/gcc421diff/a/BUILD/slc6_amd64_gcc481/external/gcc/4.8.1-cms/gcc-gcc-4_8-branch-199526/obj/./gcc/xgcc -B/build1/davidlt/gcc421diff/a/BUILD/slc6_amd64_gcc481/external/gcc/4.8.1-cms/gcc-gcc-4_8-branch-199526/obj/./gcc/ -B/build1/davidlt/gcc421diff/a/tmp/BUILDROOT/abdabd72f629a2521d29cea96ef20750/opt/cmssw/slc6_amd64_gcc481/external/gcc/4.8.1-cms/x86_64-redhat-linux-gnu/bin/ -B/build1/davidlt/gcc421diff/a/tmp/BUILDROOT/abdabd72f629a2521d29cea96ef20750/opt/cmssw/slc6_amd64_gcc481/external/gcc/4.8.1-cms/x86_64-redhat-linux-gnu/lib/ -isystem /build1/davidlt/gcc421diff/a/tmp/BUILDROOT/abdabd72f629a2521d29cea96ef20750/opt/cmssw/slc6_amd64_gcc481/external/gcc/4.8.1-cms/x86_64-redhat-linux-gnu/include -isystem /build1/davidlt/gcc421diff/a/tmp/BUILDROOT/abdabd72f629a2521d29cea96ef20750/opt/cmssw/slc6_amd64_gcc481/external/gcc/4.8.1-cms/x86_64-redhat-linux-gnu/sys-include -o conftest -g -O2 conftest.c -lm >&5 conftest.c:161:6: warning: conflicting types for built-in function 'atan2f' [enabled by default] char atan2f (); ^ configure:22394: $? = 0 configure:22394: result: yes ##### Same from GCC 4.9.0 configure:22559: checking for atan2f declaration configure:22584: /build1/davidlt/gcc421diff/490/a/BUILD/slc6_amd64_gcc490/external/gcc/4.9.0-cms/gcc-trunk-209221/obj/./gcc/xgcc -shared-libgcc -B/build1/davidlt/gcc421diff/490/a/BUILD/slc6_amd64_gcc490/external/gcc/4.9.0-cms/gcc-trunk-209221/obj/./gcc -nostdinc++ -L/build1/davidlt/gcc421diff/490/a/BUILD/slc6_amd64_gcc490/external/gcc/4.9.0-cms/gcc-trunk-209221/obj/x86_64-redhat-linux-gnu/libstdc++-v3/src -L/build1/davidlt/gcc421diff/490/a/BUILD/slc6_amd64_gcc490/external/gcc/4.9.0-cms/gcc-trunk-209221/obj/x86_64-redhat-linux-gnu/libstdc++-v3/src/.libs -L/build1/davidlt/gcc421diff/490/a/BUILD/slc6_amd64_gcc490/external/gcc/4.9.0-cms/gcc-trunk-209221/obj/x86_64-redhat-linux-gnu/libstdc++-v3/libsupc++/.libs -B/build1/davidlt/gcc421diff/490/a/tmp/BUILDROOT/b60735266dcb81302bac5b296e8c0965/opt/cmssw/slc6_amd64_gcc490/external/gcc/4.9.0-cms/x86_64-redhat-linux-gnu/bin/ -B/build1/davidlt/gcc421diff/490/a/tmp/BUILDROOT/b60735266dcb81302bac5b296e8c0965/opt/cmssw/slc6_amd64_gcc490/external/gcc/4.9.0-cms/x86_64-redhat-linux-gnu/lib/ -isystem /build1/davidlt/gcc421diff/490/a/tmp/BUILDROOT/b60735266dcb81302bac5b296e8c0965/opt/cmssw/slc6_amd64_gcc490/external/gcc/4.9.0-cms/x86_64-redhat-linux-gnu/include -isystem /build1/davidlt/gcc421diff/490/a/tmp/BUILDROOT/b60735266dcb81302bac5b296e8c0965/opt/cmssw/slc6_amd64_gcc490/external/gcc/4.9.0-cms/x86_64-redhat-linux-gnu/sys-include -c -fno-builtin -D_GNU_SOURCE conftest.cpp >&5 configure:22584: $? = 0 configure:22600: result: yes configure:22606: checking for atan2f configure:22606: /build1/davidlt/gcc421diff/490/a/BUILD/slc6_amd64_gcc490/external/gcc/4.9.0-cms/gcc-trunk-209221/obj/./gcc/xgcc -B/build1/davidlt/gcc421diff/490/a/BUILD/slc6_amd64_gcc490/external/gcc/4.9.0-cms/gcc-trunk-209221/obj/./gcc/ -B/build1/davidlt/gcc421diff/490/a/tmp/BUILDROOT/b60735266dcb81302bac5b296e8c0965/opt/cmssw/slc6_amd64_gcc490/external/gcc/4.9.0-cms/x86_64-redhat-linux-gnu/bin/ -B/build1/davidlt/gcc421diff/490/a/tmp/BUILDROOT/b60735266dcb81302bac5b296e8c0965/opt/cmssw/slc6_amd64_gcc490/external/gcc/4.9.0-cms/x86_64-redhat-linux-gnu/lib/ -isystem /build1/davidlt/gcc421diff/490/a/tmp/BUILDROOT/b60735266dcb81302bac5b296e8c0965/opt/cmssw/slc6_amd64_gcc490/external/gcc/4.9.0-cms/x86_64-redhat-linux-gnu/include -isystem /build1/davidlt/gcc421diff/490/a/tmp/BUILDROOT/b60735266dcb81302bac5b296e8c0965/opt/cmssw/slc6_amd64_gcc490/external/gcc/4.9.0-cms/x86_64-redhat-linux-gnu/sys-include -o conftest -g -O2 -I/build1/davidlt/gcc421diff/490/a/tmp/BUILDROOT/b60735266dcb81302bac5b296e8c0965/opt/cmssw/slc6_amd64_gcc490/external/gcc/4.9.0-cms/tmp/sw/include conftest.c >&5 conftest.c:143:6: warning: conflicting types for built-in function 'atan2f' char atan2f (); ^ /build1/davidlt/gcc421diff/490/a/tmp/ccVJvdmR.o: In function `main': /build1/davidlt/gcc421diff/490/a/BUILD/slc6_amd64_gcc490/external/gcc/4.9.0-cms/gcc-trunk-209221/obj/x86_64-redhat-linux-gnu/libstdc++-v3/conftest.c:154: undefined reference to `atan2f' collect2: error: ld returned 1 exit status configure:22606: $? = 1 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "package-unused" | #define PACKAGE_TARNAME "libstdc++" | #define PACKAGE_VERSION "version-unused" | #define PACKAGE_STRING "package-unused version-unused" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define STDC_HEADERS 1 | #define HAVE_SYS_TYPES_H 1 | #define HAVE_SYS_STAT_H 1 | #define HAVE_STDLIB_H 1 | #define HAVE_STRING_H 1 | #define HAVE_MEMORY_H 1 | #define HAVE_STRINGS_H 1 | #define HAVE_INTTYPES_H 1 | #define HAVE_STDINT_H 1 | #define HAVE_UNISTD_H 1 | #define HAVE_DLFCN_H 1 | #define LT_OBJDIR ".libs/" | #define _GLIBCXX_HOSTED 1 | #define _GLIBCXX_VERBOSE 1 | #define _GLIBCXX_USE_DECIMAL_FLOAT 1 | #define _GLIBCXX_USE_INT128 1 | #define _GLIBCXX_USE_FLOAT128 1 | #define HAVE_STRXFRM_L 1 | #define HAVE_STRERROR_L 1 | #define HAVE_STRERROR_R 1 | #define _GLIBCXX_USE_LONG_LONG 1 | #define HAVE_WCHAR_H 1 | #define HAVE_MBSTATE_T 1 | #define HAVE_WCTYPE_H 1 | #define _GLIBCXX_USE_WCHAR_T 1 | #define _GLIBCXX_USE_C99_MATH 1 | #define HAVE_TGMATH_H 1 | #define HAVE_COMPLEX_H 1 | #define _GLIBCXX_USE_C99_COMPLEX 1 | #define HAVE_VFWSCANF 1 | #define HAVE_VSWSCANF 1 | #define HAVE_VWSCANF 1 | #define HAVE_WCSTOF 1 | #define HAVE_ISWBLANK 1 | #define _GLIBCXX_USE_C99 1 | #define _GLIBCXX_FULLY_DYNAMIC_STRING 0 | #define HAVE_GETS 1 | #define HAVE_EOWNERDEAD 1 | #define HAVE_ENOTRECOVERABLE 1 | #define HAVE_ENOLINK 1 | #define HAVE_EPROTO 1 | #define HAVE_ENODATA 1 | #define HAVE_ENOSR 1 | #define HAVE_ENOSTR 1 | #define HAVE_ETIME 1 | #define HAVE_EBADMSG 1 | #define HAVE_ECANCELED 1 | #define HAVE_EOVERFLOW 1 | #define HAVE_ENOTSUP 1 | #define HAVE_EIDRM 1 | #define HAVE_ETXTBSY 1 | #define HAVE_ECHILD 1 | #define HAVE_ENOSPC 1 | #define HAVE_EPERM 1 | #define HAVE_ETIMEDOUT 1 | #define HAVE_EWOULDBLOCK 1 | #define HAVE_INT64_T 1 | #define HAVE_INT64_T_LONG 1 | #define HAVE_SYS_IOCTL_H 1 | #define HAVE_SYS_UIO_H 1 | #define HAVE_FENV_H 1 | #define HAVE_COMPLEX_H 1 | #define HAVE_COMPLEX_H 1 | #define _GLIBCXX_USE_C99_COMPLEX_TR1 1 | #define _GLIBCXX_USE_C99_CTYPE_TR1 1 | #define HAVE_FENV_H 1 | #define _GLIBCXX_USE_C99_FENV_TR1 1 | #define _GLIBCXX_USE_C99_STDINT_TR1 1 | #define _GLIBCXX_USE_C99_MATH_TR1 1 | #define _GLIBCXX_USE_C99_INTTYPES_TR1 1 | #define _GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1 1 | #define HAVE_STDBOOL_H 1 | #define HAVE_STDALIGN_H 1 | #define _GLIBCXX_STDIO_EOF -1 | #define _GLIBCXX_STDIO_SEEK_CUR 1 | #define _GLIBCXX_STDIO_SEEK_END 2 | #define HAVE_SYS_TIME_H 1 | #define HAVE_UNISTD_H 1 | #define _GLIBCXX_USE_CLOCK_GETTIME_SYSCALL 1 | #define _GLIBCXX_USE_CLOCK_MONOTONIC 1 | #define _GLIBCXX_USE_CLOCK_REALTIME 1 | #define _GLIBCXX_USE_SCHED_YIELD 1 | #define HAVE_SLEEP 1 | #define HAVE_USLEEP 1 | #define HAVE_LC_MESSAGES 1 | #define HAVE_SYS_SYSINFO_H 1 | #define HAVE_UNISTD_H 1 | #define HAVE_ENDIAN_H 1 | #define HAVE_EXECINFO_H 1 | #define HAVE_FLOAT_H 1 | #define HAVE_INTTYPES_H 1 | #define HAVE_LOCALE_H 1 | #define HAVE_STDINT_H 1 | #define HAVE_STDLIB_H 1 | #define HAVE_STRING_H 1 | #define HAVE_STRINGS_H 1 | #define HAVE_SYS_IPC_H 1 | #define HAVE_SYS_PARAM_H 1 | #define HAVE_SYS_RESOURCE_H 1 | #define HAVE_SYS_SEM_H 1 | #define HAVE_SYS_STAT_H 1 | #define HAVE_SYS_TIME_H 1 | #define HAVE_SYS_TYPES_H 1 | #define HAVE_UNISTD_H 1 | #define HAVE_WCHAR_H 1 | #define HAVE_WCTYPE_H 1 | #define HAVE_ISINF 1 | #define HAVE_ISNAN 1 | #define HAVE_FINITE 1 | #define HAVE_ISNANF 1 | #define HAVE_ISINFF 1 | /* end confdefs.h. */ | /* Define atan2f to an innocuous variant, in case declares atan2f. | For example, HP-UX 11i declares gettimeofday. */ | #define atan2f innocuous_atan2f | | /* System header to define __stub macros and hopefully few prototypes, | which can conflict with char atan2f (); below. | Prefer to if __STDC__ is defined, since | exists even on freestanding compilers. */ | | #ifdef __STDC__ | # include | #else | # include | #endif | | #undef atan2f | | /* Override any GCC internal prototype to avoid an error. | Use char because int might match the return type of a GCC | builtin and then its argument prototype would still apply. */ | #ifdef __cplusplus | extern "C" | #endif | char atan2f (); | /* The GNU C library defines this for functions which it implements | to always fail with ENOSYS. Some functions are actually named | something starting with __ and the normal name is an alias. */ | #if defined __stub_atan2f || defined __stub___atan2f | choke me | #endif | | int | main () | { | return atan2f (); | ; | return 0; | } configure:22606: result: no