From 0da38bbea1104183e121ec07e909205960508a22 Mon Sep 17 00:00:00 2001
From: gtheler <jeremy@seamplex.com>
Date: Thu, 2 Sep 2021 18:58:11 -0300
Subject: [PATCH] always link against gslcblas even when petsc is found

---
 configure.ac | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 2e28f996..393e27e6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -310,10 +310,13 @@ AS_IF([test -e ${gsldist}],[
  AC_CHECK_HEADER([gsl/gsl_vector.h],    [], AC_MSG_ERROR([GNU Scientific library headers libgsl-dev not found.
 Either install them with your package manager or configure with --enable-download-gsl]))
 
+ # TODO: the original idea is that
  # if we found PETSc, we use whatever BLAS it has, otherwise we use GSL's CBLAS
- AS_IF([test "x${have_petsc}" != "xyes"],
+ # but this does not work in Fedora since even though the library flexiblas
+ # that is used by PETSc does contain cblas_dgemm, it is not found by the linker
+ #AS_IF([test "x${have_petsc}" != "xyes"],
   AC_CHECK_LIB([gslcblas],[cblas_dgemm], [], AC_MSG_ERROR([GNU Scientific library CBLAS libgsl-dev not found]))
- )
+ #)
  AC_CHECK_LIB([gsl],[gsl_blas_dgemm],   [], AC_MSG_ERROR([GNU Scientific library libgsl-dev not found]))
  gsl_version="from system"
 ])