Re: make error about log2 for octave-3.1.51 (Not 3.1.50)

[Tatsuro MATSUOKA]

Hello Jaroslav

Thank you for your reply


> This looks really weird given that there is no / token on the line. I
> suspect that
> you have log2 defined to some macro and that causes problems.

I do not define log2 myself.  Perhaps gcc on cygwin defines it.
Since octave 3.0.1, the log2 fuction has no problem at building.



> Can you try running:
> 
> /opt/octave/gcc-3.4.4dw2/bin/g++ -E -C
> -I/opt/octave/gcc-3.4.4dw2/include -I/usr/include
>  -I/opt/octave/octave-3.1.51/include  -I. -I.. -I../liboctave -I../src
> -I../libcruft/misc
>  -DHAVE_CONFIG_H -mieee-fp -Wall -W -Wshadow -Wold-style-cast -g -O2 Cell.cc
> 
> in the directory where the make failure occured and posting the output?
I will show the results of which the log2 related.

493: /* Define to 1 if you have the `log2' function. */
494: /* #undef HAVE_LOG2 */


The below lines perhaps are not related but I will show them as a reference  
47686: extern double xlog2 (double x);
47687: extern Complex xlog2 (const Complex& x);
47688: extern double xlog2 (double x, int& exp);
47689: extern Complex xlog2 (const Complex& x, int& exp);

47740: extern float xlog2 (float x);
47741: extern FloatComplex xlog2 (const FloatComplex& x);
47742: extern float xlog2 (float x, int& exp);
47743: extern FloatComplex xlog2 (const FloatComplex& x, int& exp);

To see the how configure detect log2
configure:25965: checking for log2
configure:26029: /opt/octave/gcc-3.4.4dw2/bin/gcc -o conftest.exe -g -O2
-I/opt/octave/gcc-3.4.4dw2/include -I/usr/include 
-I/opt/octave/octave-3.1.51/include 
-L/opt/octave/gcc-3.4.4dw2/lib -L/opt/octave/octave-3.1.51/lib conftest.c -ldl 
-lwsock32 -lblas -lhdf5
-lz -lm  -lwsock32 >&5
conftest.c:265: warning: conflicting types for built-in function 'log2'
/cygdrive/c/DOCUME~1/Tatsu/LOCALS~1/Temp/cccEhDNQ.o: In function `main':
/home/octaves/octave-3.1.51/conftest.c:284: undefined reference to `_log2'
collect2: ld returned 1 exit status
configure:26035: $? = 1
configure: failed program was:
| /* confdefs.h.  */
| #define PACKAGE_NAME ""
| #define PACKAGE_TARNAME ""
| #define PACKAGE_VERSION ""
| #define PACKAGE_STRING ""
| #define PACKAGE_BUGREPORT ""
| #define OCTAVE_SOURCE 1
| #define _GNU_SOURCE 1
| #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 SEPCHAR ':'
| #define SEPCHAR_STR ":"
| #define __NO_MATH_INLINES 1
| #define CXX_NEW_FRIEND_TEMPLATE_DECL 1
| #define CXX_ISO_COMPLIANT_LIBRARY 1
| #define CXX_BROKEN_REINTERPRET_CAST 1
| #define CXX_ABI gnu_v3
| #define HAVE_LIBM 1
| #define HAVE_QHULL 1
| #define HAVE_PCRE 1
| #define HAVE_REGEXEC 1
| #define HAVE_REGEX 1
| #define HAVE_ZLIB_H 1
| #define HAVE_ZLIB 1
| #define HAVE_HDF5_H 1
| #define HAVE_HDF5 1
| #define HAVE_H5GGET_NUM_OBJS 1
| #define HAVE_FFTW3 1
| #define HAVE_GLPK_H 1
| #define HAVE_GLPK 1
| #define HAVE_CURL_CURL_H 1
| #define HAVE_CURL 1
| #define HAVE_MAGICK 1
| #define HAVE_GL_GL_H 1
| #define HAVE_GL_GLU_H 1
| #define HAVE_OPENGL 1
| #define HAVE_FLTK 1
| #define HAVE_IEEE754_DATA_FORMAT 1
| #define F77_FUNC(name,NAME) name ## _
| #define F77_FUNC_(name,NAME) name ## __
| #define HAVE_BLAS 1
| #define HAVE_SUITESPARSE_AMD_H 1
| #define HAVE_AMD 1
| #define HAVE_SUITESPARSE_UMFPACK_H 1
| #define HAVE_UMFPACK 1
| #define UMFPACK_SEPARATE_SPLIT 1
| #define HAVE_SUITESPARSE_COLAMD_H 1
| #define HAVE_COLAMD 1
| #define HAVE_SUITESPARSE_CCOLAMD_H 1
| #define HAVE_CCOLAMD 1
| #define HAVE_SUITESPARSE_CHOLMOD_H 1
| #define HAVE_CHOLMOD 1
| #define HAVE_SUITESPARSE_CS_H 1
| #define HAVE_CXSPARSE 1
| #define HAVE_GETHOSTNAME 1
| #define HAVE_GETPWNAM 1
| #define HAVE_LIBWSOCK32 1
| #define HAVE_DEV_T 1
| #define HAVE_INO_T 1
| #define HAVE_NLINK_T 1
| #define HAVE_NLINK_T 1
| #define HAVE_LONG_LONG_INT 1
| #define HAVE_UNSIGNED_LONG_LONG_INT 1
| #define HAVE_SIGSET_T 1
| #define HAVE_SIG_ATOMIC_T 1
| #define SIZEOF_SHORT 2
| #define SIZEOF_INT 4
| #define SIZEOF_LONG 4
| #define SIZEOF_LONG_LONG 8
| #define HAVE_ALLOCA_H 1
| #define HAVE_ALLOCA 1
| #define NPOS std::string::npos
| #define HAVE_PLACEMENT_DELETE 1
| #define HAVE_DYNAMIC_AUTO_ARRAYS 1
| #define STDC_HEADERS 1
| #define HAVE_DIRENT_H 1
| #define TIME_WITH_SYS_TIME 1
| #define HAVE_SYS_WAIT_H 1
| #define HAVE_ASSERT_H 1
| #define HAVE_CURSES_H 1
| #define HAVE_DLFCN_H 1
| #define HAVE_FCNTL_H 1
| #define HAVE_FLOAT_H 1
| #define HAVE_GRP_H 1
| #define HAVE_IEEEFP_H 1
| #define HAVE_INTTYPES_H 1
| #define HAVE_LIMITS_H 1
| #define HAVE_LOCALE_H 1
| #define HAVE_MEMORY_H 1
| #define HAVE_NCURSES_H 1
| #define HAVE_POLL_H 1
| #define HAVE_PTHREAD_H 1
| #define HAVE_PWD_H 1
| #define HAVE_STDINT_H 1
| #define HAVE_STDLIB_H 1
| #define HAVE_STRING_H 1
| #define HAVE_SYS_IOCTL_H 1
| #define HAVE_SYS_PARAM_H 1
| #define HAVE_SYS_POLL_H 1
| #define HAVE_SYS_RESOURCE_H 1
| #define HAVE_SYS_SELECT_H 1
| #define HAVE_SYS_STAT_H 1
| #define HAVE_SYS_TIME_H 1
| #define HAVE_SYS_TIMES_H 1
| #define HAVE_SYS_TYPES_H 1
| #define HAVE_SYS_UTSNAME_H 1
| #define HAVE_SYS_UTIME_H 1
| #define HAVE_TERMCAP_H 1
| #define HAVE_UNISTD_H 1
| #define HAVE_UTIME_H 1
| #define HAVE_SSTREAM 1
| #define HAVE_TERMIO_H 1
| #define HAVE_GLOB_H 1
| #define HAVE_FNMATCH_H 1
| #define HAVE_FNMATCH 1
| #define HAVE_GLOB 1
| #define HAVE_ATEXIT 1
| #define HAVE_BASENAME 1
| #define HAVE_BCOPY 1
| #define HAVE_BZERO 1
| #define HAVE_CHMOD 1
| #define HAVE_DUP2 1
| #define HAVE_ENDGRENT 1
| #define HAVE_ENDPWENT 1
| #define HAVE_EXECVP 1
| #define HAVE_EXPM1 1
| #define HAVE_EXPM1F 1
| #define HAVE_FCNTL 1
| #define HAVE_FORK 1
| #define HAVE_GETCWD 1
| #define HAVE_GETEGID 1
| #define HAVE_GETEUID 1
| #define HAVE_GETGID 1
| #define HAVE_GETGRENT 1
| #define HAVE_GETGRGID 1
| #define HAVE_GETGRNAM 1
| #define HAVE_GETPGRP 1
| #define HAVE_GETPID 1
| #define HAVE_GETPPID 1
| #define HAVE_GETPWENT 1
| #define HAVE_GETPWUID 1
| #define HAVE_GETTIMEOFDAY 1
| #define HAVE_GETUID 1
| #define HAVE_GETWD 1
| #define HAVE_KILL 1
| #define HAVE_LGAMMA 1
| #define HAVE_LGAMMAF 1
| #define HAVE_LGAMMA_R 1
| #define HAVE_LGAMMAF_R 1
| #define HAVE_LINK 1
| #define HAVE_LOCALTIME_R 1
| #define HAVE_LOG1P 1
| #define HAVE_LOG1PF 1
| #define HAVE_LSTAT 1
| #define HAVE_MEMMOVE 1
| #define HAVE_MKDIR 1
| #define HAVE_MKFIFO 1
| #define HAVE_MKSTEMP 1
| #define HAVE_ON_EXIT 1
| #define HAVE_PIPE 1
| #define HAVE_POLL 1
| #define HAVE_PUTENV 1
| #define HAVE_RAISE 1
| #define HAVE_READLINK 1
| #define HAVE_REALPATH 1
| #define HAVE_RENAME 1
| #define HAVE_RINDEX 1
| #define HAVE_RMDIR 1
| #define HAVE_ROUND 1
| #define HAVE_SELECT 1
| #define HAVE_SETGRENT 1
| #define HAVE_SETLOCALE 1
| #define HAVE_SETPWENT 1
| #define HAVE_SETVBUF 1
| #define HAVE_SIGACTION 1
| #define HAVE_SIGPENDING 1
| #define HAVE_SIGPROCMASK 1
| #define HAVE_SIGSUSPEND 1
| #define HAVE_SNPRINTF 1
| #define HAVE_STAT 1
| #define HAVE_STRCASECMP 1
| #define HAVE_STRDUP 1
| #define HAVE_STRERROR 1
| #define HAVE_STRNCASECMP 1
| #define HAVE_STRPTIME 1
| #define HAVE_STRSIGNAL 1
| #define HAVE_SYMLINK 1
| #define HAVE_TEMPNAM 1
| #define HAVE_TGAMMA 1
| #define HAVE_TGAMMAF 1
| #define HAVE_TRUNC 1
| #define HAVE_UMASK 1
| #define HAVE_UNAME 1
| #define HAVE_UNLINK 1
| #define HAVE_USLEEP 1
| #define HAVE_UTIME 1
| #define HAVE_VFPRINTF 1
| #define HAVE_VSPRINTF 1
| #define HAVE_VSNPRINTF 1
| #define HAVE_WAITPID 1
| #define HAVE__CHMOD 1
| #define HAVE__SNPRINTF 1
| #define HAVE_STRFTIME 1
| #define OCTAVE_HAVE_BROKEN_STRPTIME 1
| #define HAVE_LIBDL 1
| #define HAVE_DLOPEN 1
| #define HAVE_DLSYM 1
| #define HAVE_DLERROR 1
| #define HAVE_DLCLOSE 1
| #define HAVE_DLOPEN_API 1
| #define ENABLE_DYNAMIC_LINKING 1
| #define HAVE_TIMEVAL 1
| #define HAVE_FINITE 1
| #define HAVE_ISNAN 1
| #define HAVE_ISINF 1
| #define HAVE_COPYSIGN 1
| #define HAVE__FINITE 1
| #define HAVE__ISNAN 1
| #define HAVE__COPYSIGN 1
| #define HAVE_DECL_SIGNBIT 1
| #define HAVE_ACOSH 1
| #define HAVE_ACOSHF 1
| #define HAVE_ASINH 1
| #define HAVE_ASINHF 1
| #define HAVE_ATANH 1
| #define HAVE_ATANHF 1
| #define HAVE_ERF 1
| #define HAVE_ERFF 1
| #define HAVE_ERFC 1
| #define HAVE_ERFCF 1
| #define HAVE_EXP2 1
| #define HAVE_EXP2F 1
| /* end confdefs.h.  */
| /* Define log2 to an innocuous variant, in case <limits.h> declares log2.
|    For example, HP-UX 11i <limits.h> declares gettimeofday.  */
| #define log2 innocuous_log2
| 
| /* System header to define __stub macros and hopefully few prototypes,
|     which can conflict with char log2 (); below.
|     Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
|     <limits.h> exists even on freestanding compilers.  */
| 
| #ifdef __STDC__
| # include <limits.h>
| #else
| # include <assert.h>
| #endif
| 
| #undef log2
| 
| /* 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 log2 ();
| /* 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_log2 || defined __stub___log2
| choke me
| #endif
| 
| #ifdef F77_DUMMY_MAIN
| 
| #  ifdef __cplusplus
|      extern "C"
| #  endif
|    int F77_DUMMY_MAIN() { return 1; }
| 
| #endif
| int
| main ()
| {
| return log2 ();
|   ;
|   return 0;
| }


I think that the lines like the following will be required 

#ifndef HAVE_LOG2 
#define log2(x) xlog2(x)
#endif

Regards

Tatsuro




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