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ACX_BLAS_F77_FUNC([ACTION-IF-PASS[, ACTION-IF-FAIL[,
ACTION-IF-CROSS-COMPILING]])
ACX_BLAS_WITH_F77_FUNC([ACTION-IF-FOUND-AND-PASS[,
ACTION-IF-NOT-FOUND-OR-FAIL]])
These macros are intended as a supplement to the ACX_BLAS macro, to verify that BLAS functions are properly callable from Fortran. This is necessary, for example, if you want to build the LAPACK library on top of the BLAS.
ACX_BLAS_F77_FUNC uses the defined BLAS_LIBS and Fortran environment to check for compatibility, and takes a specific action in case of success, resp. failure, resp. cross-compilation.
ACX_BLAS_WITH_F77_FUNC is a drop-in replacement wrapper for ACX_BLAS that calls ACX_BLAS_F77_FUNC after detecting a BLAS library and rejects it on failure (i.e. pretends that no library was found).
Jaroslav Hajek <highegg@gmail.com>
2008-06-18
AC_DEFUN([ACX_BLAS_F77_FUNC], [ AC_PREREQ(2.50) AC_REQUIRE([ACX_BLAS]) # F77 call-compatibility checks if test "$cross_compiling" = yes ; then ifelse($3, ,$1,$3) elif test x"$acx_blas_ok" = xyes; then LIBS="$BLAS_LIBS $LIBS" AC_LANG_PUSH(Fortran 77) # LSAME check (LOGICAL return values) AC_MSG_CHECKING([whether LSAME is called correctly from Fortran]) AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[ logical lsame,w external lsame character c1,c2 c1 = 'A' c2 = 'B' w = lsame(c1,c2) if (w) stop 1 w = lsame(c1,c1) if (.not. w) stop 1 ]]),[acx_blas_lsame_fcall_ok=yes], [acx_blas_lsame_fcall_ok=no]) AC_MSG_RESULT([$acx_blas_lsame_fcall_ok]) # ISAMAX check (INTEGER return values) AC_MSG_CHECKING([whether ISAMAX is called correctly from Fortran]) AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[ integer isamax,i external isamax real a(2) a(1) = 1e0 a(2) = -2e0 i = isamax(2,a,1) if (i.ne.2) stop 1 ]]),[acx_blas_isamax_fcall_ok=yes], [acx_blas_isamax_fcall_ok=no]) AC_MSG_RESULT([$acx_blas_isamax_fcall_ok]) # SDOT check (REAL return values) AC_MSG_CHECKING([whether DDOT is called correctly from Fortran]) AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[ real sdot,a(1),b(1),w external sdot a(1) = 1e0 b(1) = 2e0 w = sdot(1,a,1,b,1) if (w .ne. a(1)*b(1)) stop 1 ]]),[acx_blas_sdot_fcall_ok=yes], [acx_blas_sdot_fcall_ok=no]) AC_MSG_RESULT([$acx_blas_sdot_fcall_ok]) # DDOT check (DOUBLE return values) AC_MSG_CHECKING([whether DDOT is called correctly from Fortran]) AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[ double precision ddot,a(1),b(1),w external ddot a(1) = 1d0 b(1) = 2d0 w = ddot(1,a,1,b,1) if (w .ne. a(1)*b(1)) stop 1 ]]),[acx_blas_ddot_fcall_ok=yes], [acx_blas_ddot_fcall_ok=no]) AC_MSG_RESULT([$acx_blas_ddot_fcall_ok]) # CDOTU check (COMPLEX return values) AC_MSG_CHECKING([whether CDOTU is called correctly from Fortran]) AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[ complex cdotu,a(1),b(1),w external cdotu a(1) = cmplx(1e0,1e0) b(1) = cmplx(1e0,2e0) w = cdotu(1,a,1,b,1) if (w .ne. a(1)*b(1)) stop 1 ]]),[acx_blas_cdotu_fcall_ok=yes], [acx_blas_cdotu_fcall_ok=no]) AC_MSG_RESULT([$acx_blas_cdotu_fcall_ok]) # ZDOTU check (DOUBLE COMPLEX return values) AC_MSG_CHECKING([whether ZDOTU is called correctly from Fortran]) AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[ double complex zdotu,a(1),b(1),w external zdotu a(1) = dcmplx(1d0,1d0) b(1) = dcmplx(1d0,2d0) w = zdotu(1,a,1,b,1) if (w .ne. a(1)*b(1)) stop 1 ]]),[acx_blas_zdotu_fcall_ok=yes], [acx_blas_zdotu_fcall_ok=no]) AC_MSG_RESULT([$acx_blas_zdotu_fcall_ok]) AC_LANG_POP(Fortran 77) # if any of the tests failed, reject the BLAS library if test $acx_blas_lsame_fcall_ok = yes \ -a $acx_blas_sdot_fcall_ok = yes \ -a $acx_blas_ddot_fcall_ok = yes \ -a $acx_blas_cdotu_fcall_ok = yes \ -a $acx_blas_zdotu_fcall_ok = yes ; then acx_blas_f77_func_ok=yes; $1 else acx_blas_f77_func_ok=no; $2 fi fi ])dnl ACX_BLAS_F77_FUNC AC_DEFUN([ACX_BLAS_WITH_F77_FUNC], [ AC_PREREQ(2.50) ACX_BLAS([# disable special action], []) if test x$acx_blas_ok = xyes ; then ACX_BLAS_F77_FUNC( [ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1])], [acx_blas_ok=no; BLAS_LIBS=]) fi if test x$acx_blas_ok = xno ; then $2 fi ])dnl ACX_BLAS_WITH_F77_FUNC
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