boinc/m4/boinc_check_flags.m4

AC_DEFUN([BOINC_CHECK_CFLAG],[
  AC_LANG_PUSH(C)
  sv_flags="${CFLAGS}"
  AC_MSG_CHECKING(if C compiler supports $1)
  CFLAGS="${CFLAGS} $1"
  AC_LINK_IFELSE([
    AC_LANG_PROGRAM([[
      #define CONFIG_TEST
      int foo() {return 1;}
    ]],
    [ return foo(); ])],
    [
      AC_MSG_RESULT(yes)
      $2
    ],
    [ 
      AC_MSG_RESULT(no)
      CFLAGS="${sv_flags}"
      $3
    ]
  )
  AC_LANG_POP(C)
])

AC_DEFUN([BOINC_CHECK_CXXFLAG],[
  AC_LANG_PUSH(C++)
  sv_flags="${CXXFLAGS}"
  AC_MSG_CHECKING(if C++ compiler supports $1)
  CXXFLAGS="${CXXFLAGS} $1"
  AC_LINK_IFELSE([
    AC_LANG_PROGRAM([[
      #define CONFIG_TEST
      int foo() {return 1;}
    ]],
    [ return foo(); ])],
    [
      AC_MSG_RESULT(yes)
      $2
    ],
    [ 
      AC_MSG_RESULT(no)
      CXXFLAGS="${sv_flags}"
      $3
    ]
  )
  AC_LANG_POP(C++)
])

AC_DEFUN([BOINC_CHECK_FFLAG],[
  AC_LANG_PUSH(Fortran 77)
  sv_flags="${FFLAGS}"
  AC_MSG_CHECKING(if f77 compiler supports $1)
  FFLAGS="${FFLAGS} $1"
  AC_LINK_IFELSE([
    AC_LANG_PROGRAM([],
    [      write(*,*) 'hello' ])],
    [
      AC_MSG_RESULT(yes)
      $2
    ],
    [ 
      AC_MSG_RESULT(no)
      FFLAGS="${sv_flags}"
      $3
    ]
  )
  AC_LANG_POP(Fortran 77)
])


AC_DEFUN([BOINC_CHECK_LDFLAG],[
  AC_LANG_PUSH(C)
  sv_flags="${LDFLAGS}"
  AC_MSG_CHECKING(if $LD supports $1)
  LDFLAGS="${LDFLAGS} $1"
  AC_LINK_IFELSE([
    AC_LANG_PROGRAM([[
      #define CONFIG_TEST
      int foo() {return 1;}
    ]],
    [ return foo(); ])],
    [
      AC_MSG_RESULT(yes)
      $2
    ],
    [ 
      AC_MSG_RESULT(no)
      LDFLAGS="${sv_flags}"
      $3
    ]
  )
  AC_LANG_POP(C)
])