Running into several issues with trying to compile on x86-64 based Linux system with PGI:

1. lapack/potf2/zpotf2_L.c fails with an 'Illegal lvalue' error:

pgcc -c -O2 -DMAX_STACK_ALLOC=2048 -mp -tp p7-64 -DF_INTERFACE_PGI -fPIC -DDYNAMIC_ARCH -DSMP_SERVER -DUSE_OPENMP -DNO_WARMUP -DMAX_CPU_NUMBER=4 -DASMNAME=zpotf2_L -DASMFNAME=zpotf2_L_ -DNAME=zpotf2_L_ -DCNAME=zpotf2_L -DCHAR_NAME=\"zpotf2_L_\" -DCHAR_CNAME=\"zpotf2_L\" -DNO_AFFINITY -I../.. -DDOUBLE -DCOMPLEX -DCOMPLEX -DDOUBLE zpotf2_L.c -o zpotf2_L.o
PGC-S-0058-Illegal lvalue (zpotf2_L.c: 71)
PGC/x86-64 Linux Rel Dev-r117179: compilation completed with severe errors

This error also occurs with zpotf2_U.c.

Problem seems to be related to this construct, in common.h:

#if defined(C_PGI) || defined(C_SUN)
#define CREAL(X) (*((FLOAT *)&X + 0))
#define CIMAG(X) (*((FLOAT *)&X + 1))

If I change the code in zpotf2_L.c to use the standard C99 complex macros creal() and cimag(), the error goes away.

This problem also affects lapack/lauu2/zlauu2_L.c and lapack/lauu2/zlauu2_U.c.

2. kernel/x86_64/cdot.c fails to compile:

pgcc -c -O2 -DMAX_STACK_ALLOC=2048 -mp -tp p7-64 -DF_INTERFACE_PGI -fPIC -DDYNAMIC_ARCH -DSMP_SERVER -DUSE_OPENMP -DNO_WARMUP -DMAX_CPU_NUMBER=4 -DASMNAME=cdotc_k_SANDYBRIDGE -DASMFNAME=cdotc_k_SANDYBRIDGE_ -DNAME=cdotc_k_SANDYBRIDGE_ -DCNAME=cdotc_k_SANDYBRIDGE -DCHAR_NAME=\"cdotc_k_SANDYBRIDGE_\" -DCHAR_CNAME=\"cdotc_k_SANDYBRIDGE\" -DNO_AFFINITY -DTS=_SANDYBRIDGE -I.. -DBUILD_KERNEL -DTABLE_NAME=gotoblas_SANDYBRIDGE -UDOUBLE -DCOMPLEX -DCOMPLEX -UDOUBLE -DCONJ ../kernel/x86_64/cdot.c -o cdotc_k_SANDYBRIDGE.o
PGC-S-0040-Illegal use of symbol, __real__ (../kernel/x86_64/cdot.c: 103)
PGC-W-0156-Type not specified, 'int' assumed (../kernel/x86_64/cdot.c: 103)
PGC-S-0040-Illegal use of symbol, __imag__ (../kernel/x86_64/cdot.c: 104)
PGC-W-0156-Type not specified, 'int' assumed (../kernel/x86_64/cdot.c: 104)
PGC-S-0043-Redefinition of symbol, result (../kernel/x86_64/cdot.c: 104)
PGC-S-0040-Illegal use of symbol, __real__ (../kernel/x86_64/cdot.c: 167)
PGC-W-0156-Type not specified, 'int' assumed (../kernel/x86_64/cdot.c: 167)
PGC-S-0043-Redefinition of symbol, result (../kernel/x86_64/cdot.c: 167)
PGC-S-0040-Illegal use of symbol, __imag__ (../kernel/x86_64/cdot.c: 168)
PGC-W-0156-Type not specified, 'int' assumed (../kernel/x86_64/cdot.c: 168)
PGC-S-0043-Redefinition of symbol, result (../kernel/x86_64/cdot.c: 168)
PGC/x86-64 Linux Rel Dev-r117182: compilation completed with severe errors
make[1]: *** [cdotc_k_SANDYBRIDGE.o] Error 2

This is due to the use of a GNU-specific extension for C99 complex datatypes, which is not supported by PGI:

__real__ result = 0.0 ;
__imag__ result = 0.0 ;

One can fix this by changing the above as follows, to comply with the C99 standard:

result = 0.0 + _Complex_I*0.0;

This also affects kernel/x86_64/zdot.c.

Could you fix these issues for the next release? Thanks!