How to reproduce; wget -c http://www.netlib.org/blas/blast-forum/cblas.tgz
unpack & build. make all make alltst and run CBLAS_ICAMAX test to see : [~/CBLAS]> ./testing/xccblat1 Complex CBLAS Test Program Results Test of subprogram number 1 CBLAS_CDOTC ----- PASS ----- Test of subprogram number 2 CBLAS_CDOTU ----- PASS ----- Test of subprogram number 3 CBLAS_CAXPY ----- PASS ----- Test of subprogram number 4 CBLAS_CCOPY ----- PASS ----- Test of subprogram number 5 CBLAS_CSWAP ----- PASS ----- Test of subprogram number 6 CBLAS_SCNRM2 ----- PASS ----- Test of subprogram number 7 CBLAS_SCASUM ----- PASS ----- Test of subprogram number 8 CBLAS_CSCAL ----- PASS ----- Test of subprogram number 9 CBLAS_CSSCAL ----- PASS ----- Test of subprogram number 10 CBLAS_ICAMAX FAIL CASE N INCX INCY MODE COMP TRUE DIFFERENCE 10 4 1 9999 9999 3 2 1 10 4 2 9999 9999 3 2 1 Last test fails. gcc says : [~]> gcc -v Using built-in specs. Target: i686-pc-linux-gnu Configured with: ../configure --prefix=/usr --bindir=/usr/i686-pc-linux-gnu/gcc/4.3.0 --includedir=/usr/lib/gcc/i686-pc-linux-gnu/4.3.0/include --datadir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0 --mandir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0/man --infodir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0/info --with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/4.3.0/include/g++-v3 --host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --disable-libgcj --disable-libssp --disable-multilib --disable-nls --disable-werror --disable-mudflap --disable-libmudflap --enable-checking=release --enable-clocale=gnu --enable-__cxa_atexit --enable-languages=c,c++,fortran,objc --enable-libstdcxx-allocator=new --enable-shared --enable-ssp --enable-threads=posix --enable-version-specific-runtime-libs --without-included-gettext --without-system-libunwind --with-system-zlib --with-pkgversion='Pardus Linux' --with-bugurl=http://bugs.pardus.org.tr Thread model: posix gcc version 4.3.0 20071229 [trunk revision 131217] (Pardus Linux) -- Summary: CBLAS_ICAMAX test from cblas fails Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ismail at pardus dot org dot tr http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34616