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comparison configure.ac @ 15852:cd115ec92248

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build: Check that system has math defines such as M_PI. * configure.ac: Check for math defines such as M_PI. Fail to build if no defines can be found. * liboctave/numeric/lo-specfun.cc: Use M_PI from math.h now that build system has verified that it is present.
author Rik <rik@octave.org>
date Wed, 26 Dec 2012 12:56:38 -0800
parents ffd1a99733bd
children 98f6abe01b5a
comparison
equal deleted inserted replaced
15851:4bfe605f5ecf 15852:cd115ec92248
2010 2010
2011 dnl Use multiple AC_CHECKs to avoid line continuations '\' in list 2011 dnl Use multiple AC_CHECKs to avoid line continuations '\' in list
2012 AC_CHECK_FUNCS([acosh acoshf asinh asinhf atanh atanhf cbrt cbrtf]) 2012 AC_CHECK_FUNCS([acosh acoshf asinh asinhf atanh atanhf cbrt cbrtf])
2013 AC_CHECK_FUNCS([erf erff erfc erfcf exp2f hypotf _hypotf log2 log2f]) 2013 AC_CHECK_FUNCS([erf erff erfc erfcf exp2f hypotf _hypotf log2 log2f])
2014 2014
2015 ## Check for math defines such as M_LN2 in math.h
2016 AC_CACHE_CHECK([for MATH DEFINES in math.h],
2017 [octave_cv_header_math_defines],
2018 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2019 #include <math.h>
2020 ]], [[
2021 double x = M_LN2;]])],
2022 octave_cv_header_math_defines=yes,
2023 octave_cv_header_math_defines=no)
2024 ])
2025
2026 if test $octave_cv_header_math_defines = no; then
2027 ## Check again and try defining _USE_MATH_DEFINES
2028 AC_CACHE_CHECK([whether _USE_MATH_DEFINES needs to be defined],
2029 [octave_cv_header__use_math_defines],
2030 [save_CPPFLAGS="$CPPFLAGS"
2031 CPPFLAGS="$CPPFLAGS -D_USE_MATH_DEFINES"
2032 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2033 #include <math.h>
2034 ]], [[
2035 double x = M_LN2;]])],
2036 octave_cv_header__use_math_defines=yes,
2037 octave_cv_header__use_math_defines=no)
2038 CPPFLAGS="$save_CPPFLAGS"
2039 ])
2040 if test $octave_cv_header__use_math_defines = yes; then
2041 octave_cv_header_math_defines=yes
2042 AC_DEFINE(_USE_MATH_DEFINES, 1,
2043 [Define to 1 if _USE_MATH_DEFINES is required to get math constants like M_LN2.])
2044 CPPFLAGS="$CPPFLAGS -D_USE_MATH_DEFINES"
2045 fi
2046 fi
2047
2048 if test $octave_cv_header_math_defines = yes; then
2049 AC_DEFINE(HAVE_MATH_DEFINES, 1,
2050 [Define to 1 if defines such as M_PI are available in math.h])
2051 else
2052 AC_MSG_ERROR([MATH DEFINES in math.h such as M_PI are required to build Octave])
2053 fi
2054
2015 ## Windows-specific tests for extra #defines 2055 ## Windows-specific tests for extra #defines
2016 case $canonical_host_type in 2056 case $canonical_host_type in
2017 *-*-msdosmsvc | *-*-mingw*) 2057 *-*-msdosmsvc | *-*-mingw*)
2018 AC_MSG_CHECKING([for required _WIN32_WINNT]) 2058 AC_MSG_CHECKING([for required _WIN32_WINNT])
2019 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 2059 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2024 ]], [])], 2064 ]], [])],
2025 [AC_MSG_RESULT([none])], 2065 [AC_MSG_RESULT([none])],
2026 [AC_DEFINE(_WIN32_WINNT, 0x0403, 2066 [AC_DEFINE(_WIN32_WINNT, 0x0403,
2027 [Define to 0x0403 to access InitializeCriticalSectionAndSpinCount.]) 2067 [Define to 0x0403 to access InitializeCriticalSectionAndSpinCount.])
2028 AC_MSG_RESULT([0x0403])]) 2068 AC_MSG_RESULT([0x0403])])
2029 AC_MSG_CHECKING([whether _USE_MATH_DEFINES needs to be defined])
2030 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2031 #include <math.h>
2032 ]], [[
2033 int x = M_LN2;]])],
2034 [AC_MSG_RESULT([no])],
2035 [AC_DEFINE(_USE_MATH_DEFINES, 1,
2036 [Define to 1 if your system needs to define math constants like M_LN2.])
2037 AC_MSG_RESULT([yes])])
2038 ;; 2069 ;;
2039 esac 2070 esac
2040 2071
2041 ## Windows-specific use of functions 2072 ## Windows-specific use of functions
2042 case $canonical_host_type in 2073 case $canonical_host_type in