Full_Name: Christian Marquardt
Version: 2.2.1
OS: Linux
Submission from: (NULL) (84.167.229.240)
Hello,
I believe this is a bug in the configuration / installation:
When configuring R-2.2.1 using the Intel v9 Fortran compiler as default Fortran
compiler and g++ as C++ compiler on a Suse 9.3 Linux, the configuration script
finds that the C and Fortran idea of double comples disagree.
I have tried to extract the test used for this from m4/R.m4 (a slightly modified
version of the two test files is added at the end). When compiling
ifort -c ctest.f
gcc -c cftest.c
and linking properly,
ifort -nofor_main cftest.o ctest.o -o runme
running the executable gives the following output:
./runme
123.456000 14.710644
0.000000 -0.000006
To me, this inicates that the test should actually be passed successfully.
Unfortunately, I haven't quite understood how to rebuild the configure.ac etc
once R.m4 is changed; otherwise I would try to come up with a patch for R.m4.
But maybe someone else can fix this?
Many thanks,
Christian.
----<ctest.f>------------------------------------
subroutine cftest(x)
complex*16 x(3)
integer i
c a few tests of constructs that are sometimes missing
if(x(1) .eq. x(1)) i = 0
x(1) = x(1)*x(2) + x(3)
end
----<cftest.c>------------------------------------
#include <math.h>
#define HAVE_F77_UNDERSCORE 1
#ifdef HAVE_F77_UNDERSCORE
# define F77_SYMBOL(x) x ## _
#else
# define F77_SYMBOL(x) x
#endif
typedef struct {
double r;
double i;
} Rcomplex;
extern void F77_SYMBOL(cftest)(Rcomplex *x);
int main () {
Rcomplex z[3];
z[0].r = 3.14159265;
z[0].i = 2.172;
z[1].i = 3.14159265;
z[1].r = 2.172;
z[2].r = 123.456;
z[2].i = 0.123456;
F77_SYMBOL(cftest)(z);
printf("%f %f\n", z[0].r, z[0].i);
printf("%f %f\n", z[0].r - 123.456, z[0].i - 14.71065);
if(fabs(z[0].r - 123.456) < 1e-4 && fabs(z[0].i - 14.71065) < 1e-4)
exit(0);
else exit(1);
}
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