remove so many checks.

src/CMakeLists.txt

@@ -14,52 +14,10 @@ if(NOT WIN32)
   endif()
 endif()
 
-#
-# Checks for header files. AC_HEADER_STDC !! obsolete, need to check? Define
-# STDC_HEADERS if the system has ANSI C header files. Specifically, this macro
-# checks for `stdlib.h', `stdarg.h', `string.h', and `float.h'; Lifted the cmake
-# checks from gd-libdg, Lua https://bitbucket.org/libgd/gd-libgd
-# https://github.com/LuaDist/libgd/tree/master/cmake/modules
-include(CheckIncludeFiles)
-set(CMAKE_REQUIRED_INCLUDES "/usr/include" "/usr/local/include")
-set(CMAKE_MODULE_PATH "${qucs-core_SOURCE_DIR}/cmake/modules")
-include(AC_HEADER_STDC)
-
-#
-# Further header checks
-#
-include(CheckIncludeFile)
-
-# list of headers to be checked
-set(INCLUDES ieeefp.h memory.h stddef.h stdlib.h string.h unistd.h)
-
-#
-# Check if header can be included. * Define HAVE_[basename]_H to 1 if you have
-# the header.
-#
-foreach(header ${INCLUDES})
-  get_filename_component(base ${header} NAME_WE)
-  string(TOUPPER ${base} base)
-  check_include_file(${header} HAVE_${base}_H)
-  # MESSAGE(STATUS "${header}  --> ${HAVE_${base}_H}")
-endforeach()
-
-# Checks for typedefs, structures, and compiler characteristics. AC_C_CONST
-# !!obsolete AC_C_CONST "This macro is obsolescent, as current C compilers
-# support `const'. New programs need not use this macro."
-
 #
 # Check for type sizes.
 #
 include(CheckTypeSize)
-check_type_size("short" SIZEOF_SHORT)
-check_type_size("int" SIZEOF_INT)
-check_type_size("long" SIZEOF_LONG)
-check_type_size("double" SIZEOF_DOUBLE)
-check_type_size("long double" SIZEOF_LONG_DOUBLE)
-# MESSAGE(STATUS "short  ${SIZEOF_SHORT}" ) MESSAGE(STATUS "int   ${SIZEOF_INT}"
-# ) MESSAGE(STATUS "long  ${SIZEOF_LONG}" ) MESSAGE(STATUS "double
-# ${SIZEOF_DOUBLE}" ) MESSAGE(STATUS "long double ${SIZEOF_LONG_DOUBLE}" )
 
 #
 # Check for double type. * valid types are: double, float and long double. *
@@ -107,154 +65,6 @@ set(QUCS_DOUBLE_SIZE ${DoubleSize})
 configure_file("${qucs-core_SOURCE_DIR}/qucs_typedefs.h.cmake"
                "${qucs-core_BINARY_DIR}/qucs_typedefs.h")
 
-#
-# Check for library functions * not all functions seem to be used after defined.
-# TODO check for HAVE_{func}
-#
-include(CheckFunctionExists)
-set(REQUIRED_FUNCTIONS
-    floor
-    pow
-    exp
-    sqrt
-    log10
-    log
-    cos
-    sin
-    acos
-    asin # for real.cpp
-    tan
-    atan
-    sinh
-    cosh
-    tanh
-    fabs
-    modf
-    atan2
-    jn
-    yn
-    erf
-    erfc # for fspecial.cpp
-    round
-    trunc
-    acosh
-    asinh # for real.cpp
-    )
-
-foreach(func ${REQUIRED_FUNCTIONS})
-  string(TOUPPER ${func} FNAME)
-  check_cxx_symbol_exists(${func} cmath HAVE_${FNAME})
-  # message(STATUS "${func}  --> ${HAVE_${FNAME}}")
-endforeach()
-
-#
-# Checks for complex classes and functions, as in the Autotools scripts.
-#
-# AC_CXX_NAMESPACES !!custom m4 AC_CXX_HAVE_COMPLEX !!custom m4
-# AC_CXX_HAVE_TR1_COMPLEX !!custom m4 AC_CHECK_CXX_COMPLEX_FUNCS([cos cosh exp
-# log log10 sin sinh sqrt tan tanh]) !!custom m4
-# AC_CHECK_CXX_COMPLEX_FUNCS([acos acosh asin asinh atan atanh])
-# AC_CHECK_CXX_COMPLEX_FUNCS([log2 norm]) AC_CHECK_CXX_COMPLEX_POW
-# AC_CHECK_CXX_COMPLEX_ATAN2         !failed, need libstdc?
-# AC_CHECK_CXX_COMPLEX_FMOD          !failed: AC_CHECK_CXX_COMPLEX_POLAR
-# AC_CHECK_CXX_COMPLEX_POLAR_COMPLEX !failed
-
-#
-# Check whether the compiler has complex<T>
-#
-try_compile(HAVE_COMPLEX ${CMAKE_BINARY_DIR}
-            ${qucs-core_SOURCE_DIR}/cmake/complex.cpp OUTPUT_VARIABLE TRY_OUT)
-if(NOT HAVE_COMPLEX)
-  message(SEND_ERROR "HAVE_COMPLEX failed") # ${TRY_OUT}")
-endif()
-
-#
-# Check std::vector::erase iterator type [const_iterator | iterator]
-#
-message(STATUS "Checking HAVE_ERASE_CONSTANT_ITERATOR")
-try_compile(
-  HAVE_ERASE_CONSTANT_ITERATOR ${CMAKE_BINARY_DIR}
-  ${qucs-core_SOURCE_DIR}/cmake/erase_iterator_type.cpp OUTPUT_VARIABLE TRY_OUT)
-if(HAVE_ERASE_CONSTANT_ITERATOR)
-  message(STATUS "Using std::vector:erase iterator type : const_iterator")
-else()
-  message(STATUS "Using std::vector:erase iterator type : iterator")
-endif()
-
-#
-# Check for list of complex functions.
-#
-set(COMPLEX_FUNCS_GRP1
-    acos
-    acosh
-    asin
-    asinh
-    atan
-    atanh
-    cos
-    cosh
-    exp
-    log
-    log10
-    sin
-    sinh
-    sqrt
-    tan
-    tanh
-    log2
-    norm)
-set(COMPLEX_FUNCS_GRP2 pow atan2 fmod polar polar_complex)
-
-#
-# test complex function group 1 code inlined to easily replace '${func}'
-#
-foreach(func ${COMPLEX_FUNCS_GRP1})
-  set(code
-      " #include <complex>
-      using namespace std\;
-    #ifdef log2
-    #undef log2
-    #endif
-
-    int main() {
-      complex<double> a\;
-      ${func}(a)\;
-      return 0\;
-    }")
-
-  file(WRITE ${qucs-core_SOURCE_DIR}/cmake/test_${func}.cpp ${code})
-
-  string(TOUPPER ${func} FNAME)
-
-  message(STATUS "Checking HAVE_CXX_COMPLEX_${FNAME}")
-
-  try_compile(
-    HAVE_CXX_COMPLEX_${FNAME} ${CMAKE_BINARY_DIR}
-    ${qucs-core_SOURCE_DIR}/cmake/test_${func}.cpp OUTPUT_VARIABLE TRY_OUT)
-  if(NOT HAVE_CXX_COMPLEX_${FNAME})
-    message(STATUS "HAVE_CXX_COMPLEX_${FNAME} failed") # ${TRY_OUT}")
-  endif()
-
-  file(REMOVE ${qucs-core_SOURCE_DIR}/cmake/test_${func}.cpp ${code})
-endforeach()
-
-#
-# test complex function group 2 use prepared source file.
-#
-foreach(func ${COMPLEX_FUNCS_GRP2})
-  string(TOUPPER ${func} FNAME)
-
-  message(STATUS "Checking HAVE_CXX_COMPLEX_${FNAME}")
-
-  try_compile(
-    HAVE_CXX_COMPLEX_${FNAME} ${CMAKE_BINARY_DIR}
-    ${qucs-core_SOURCE_DIR}/cmake/complex_${func}.cpp
-    COMPILE_DEFINITIONS -DHAVE_NAMESPACES -DHAVE_COMPLEX -DHAVE_TR1_COMPLEX
-    OUTPUT_VARIABLE TRY_OUT)
-  if(NOT HAVE_CXX_COMPLEX_${FNAME})
-    message(STATUS "HAVE_CXX_COMPLEX_${FNAME} failed") # ${TRY_OUT}")
-  endif()
-endforeach()
 
 #
 # Configure the header config.h, interpolate above definitions.