configure fails to find mpfr library in non-standard location about rhmc-on-gpu

[coppolachan]

I think I solved it with the new Makefile.am.
Unfortunately I do not have access to a machine without a std installation, but I'm pretty sure this is working now. See the commit history for details.

Tell me if this solved the issue and I will close this issue.

[claudiopica]

The issue still persists. I think it is at the level of the configure.ac file in the root directory.
The test program to check for the mpfr library fails to compile because of the non-standard location of the library, resulting in configure to exit with a missing library error.

I think at the moment there are 2 problems in the configure.ac file:

1. we should test for the presence of "--with-mpfr" before the check of the library;
2. set LIB to include MPFR_LIB before the check of the library.

This is an extract of the config.log file:

[Omissis]
It was created by rhmc_staggered_cuda configure 0.1.2, which was
generated by GNU Autoconf 2.67. Invocation command line was

$ ./configure --enable-cuda=sm_20 --with-mpfr=/people/disk2/pica

[omissis]

configure:4484: checking for mpfr_init in -lmpfr
configure:4509: gcc -o conftest -g -O2 conftest.c -lmpfr >&5
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libmpfr.a(set_dfl_prec.o): In function mpfr_set_default_prec': (.text+0x37): undefined reference to__gmp_assert_fail'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libmpfr.a(init2.o): In function mpfr_init2': (.text+0x3c): undefined reference to__gmp_assert_fail'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libmpfr.a(init2.o): In function mpfr_init2': (.text+0x56): undefined reference to__gmp_allocate_func'
collect2: ld returned 1 exit status
configure:4509: $? = 1
configure: failed program was:
| /* confdefs.h /
| #define PACKAGE_NAME "rhmc_staggered_cuda"
| #define PACKAGE_TARNAME "rhmc_staggered_cuda"
| #define PACKAGE_VERSION "0.1.2"
| #define PACKAGE_STRING "rhmc_staggered_cuda 0.1.2"
| #define PACKAGE_BUGREPORT "[email protected]"
| #define PACKAGE_URL ""
| #define PACKAGE "rhmc_staggered_cuda"
| #define VERSION "0.1.2"
| / end confdefs.h. /
|
| / Override any GCC internal prototype to avoid an error.
| Use char because int might match the return type of a GCC
| builtin and then its argument prototype would still apply. */
| #ifdef __cplusplus
| extern "C"
| #endif
| char mpfr_init ();
| int
| main ()
| {
| return mpfr_init ();
| ;
| return 0;
| }
configure:4518: result: no

[coppolachan]

Try the new version. I included a special test for MPFR library in a separate .m4 file and I am not using anymore the AC_CHECK_LIB directive in configure.ac . I tried with a non standard installation in my machine and it works, the test is passed and it is invoked using the correct -I and -L flags.
Tell me if it works.

[claudiopica]

Everything works fine now!

[coppolachan]

Perfect. Now should work also in Rome, where they had similar problems.