See if this fixes the gcc decripency

tests were using 4.8 not 7+

.gitlab-ci.yml

@@ -22,7 +22,7 @@ build-intel:
 build-gnu:
   stage: build
   script:
-    - module load gcc/8 impi mkl cmake anaconda/3/2019.03 mpi4py git
+    - module load gcc impi mkl cmake anaconda/3/2019.03 mpi4py git
     - mkdir build_gcc/
     - cd build_gcc/
     - conda create -p sisso/ python=3.7 mkl numpy scipy pandas pytest

CMakeLists.txt

@@ -297,7 +297,7 @@ if(USE_PARAMS)
             PREFIX "external/eigen"
             GIT_REPOSITORY "https://gitlab.com/libeigen/eigen.git"
             GIT_TAG "3.3"
-            CMAKE_ARGS "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER};-DCMAKE_INSTALL_PREFIX=${EIGEN_INSTALL_DIR};-DINCLUDE_INSTALL_DIR=${EIGEN_INCLUDE_DIRS};"
+            CMAKE_ARGS "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER};-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER};-DCMAKE_INSTALL_PREFIX=${EIGEN_INSTALL_DIR};-DINCLUDE_INSTALL_DIR=${EIGEN_INCLUDE_DIRS};"
             BINARY_DIR "${EIGEN_BUILD_DIR}"
             INSTALL_DIR "${EIGEN_INSTALL_DIR}"
         )
@@ -317,7 +317,7 @@ if(USE_PARAMS)
             PREFIX "external/glog"
             GIT_REPOSITORY "https://github.com/google/glog.git"
             GIT_TAG "v0.4.0"
-            CMAKE_ARGS "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER};-DWITH_GFLAGS=OFF;-DBUILD_SHARED_LIBS=ON;-DCMAKE_INSTALL_BINDIR=${GLOG_BIN_DIRS};-DCMAKE_INSTALL_INCLUDEDIR=${GLOG_INCLUDE_DIRS};-DCMAKE_INSTALL_LIBDIR=${GLOG_LIBRARY_DIRS}"
+	    CMAKE_ARGS "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER};-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER};-DWITH_GFLAGS=OFF;-DBUILD_SHARED_LIBS=ON;-DCMAKE_INSTALL_BINDIR=${GLOG_BIN_DIRS};-DCMAKE_INSTALL_INCLUDEDIR=${GLOG_INCLUDE_DIRS};-DCMAKE_INSTALL_LIBDIR=${GLOG_LIBRARY_DIRS}"
             BINARY_DIR "${GLOG_BUILD_DIR}"
             INSTALL_DIR "${GLOG_INSTALL_DIR}"
         )
@@ -339,7 +339,7 @@ if(USE_PARAMS)
         PREFIX "external/ceres"
         GIT_REPOSITORY "https://ceres-solver.googlesource.com/ceres-solver.git"
         GIT_TAG "1.14.0"
-	CMAKE_ARGS "-DCMAKE_INSTALL_PREFIX=${CERES_INSTALL_DIR};-DGFLAGS=OFF;-DMINIGLOG=OFF;-DBUILD_SHARED_LIBS=ON;-DSUITESPARSE=OFF;-DCXSPARSE=OFF;-DEIGENSPARSE=OFF;-DEIGEN_INCLUDE_DIR_HINTS=${EIGEN_INCLUDE_DIRS};-DGLOG_INCLUDE_DIR_HINTS=${GLOG_INCLUDE_DIRS};-DGLOG_LIBRARY_DIR_HINTS=${GLOG_LIBRARY_DIRS};-DLIB_SUFFIX=''"
+	CMAKE_ARGS "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER};-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER};-DCMAKE_INSTALL_PREFIX=${CERES_INSTALL_DIR};-DGFLAGS=OFF;-DMINIGLOG=OFF;-DBUILD_SHARED_LIBS=ON;-DSUITESPARSE=OFF;-DCXSPARSE=OFF;-DEIGENSPARSE=OFF;-DEIGEN_INCLUDE_DIR_HINTS=${EIGEN_INCLUDE_DIRS};-DGLOG_INCLUDE_DIR_HINTS=${GLOG_INCLUDE_DIRS};-DGLOG_LIBRARY_DIR_HINTS=${GLOG_LIBRARY_DIRS};-DLIB_SUFFIX=''"
         BINARY_DIR "${CERES_BUILD_DIR}"
     )
     if(NOT GLOG_FOUND)

cmake/toolchains/gnu_base.cmake

@@ -2,6 +2,7 @@
 # Basic Flags #
 ###############
 set(CMAKE_CXX_COMPILER g++ CACHE STRING "")
+set(CMAKE_CXX_COMPILER gcc CACHE STRING "")
 set(CMAKE_CXX_FLAGS "-O2" CACHE STRING "")
 set(USE_PARAMS OFF CACHE BOOL "")
 set(USE_PYTHON OFF CACHE BOOL "")

cmake/toolchains/gnu_param.cmake

@@ -2,6 +2,7 @@
 # Basic Flags #
 ###############
 set(CMAKE_CXX_COMPILER g++ CACHE STRING "")
+set(CMAKE_CXX_COMPILER gcc CACHE STRING "")
 set(CMAKE_CXX_FLAGS "-O2" CACHE STRING "")
 set(USE_PYTHON OFF CACHE BOOL "")
 set(USE_PARAMS ON CACHE BOOL "")

cmake/toolchains/gnu_param_py.cmake

@@ -2,6 +2,7 @@
 # Basic Flags #
 ###############
 set(CMAKE_CXX_COMPILER g++ CACHE STRING "")
+set(CMAKE_CXX_COMPILER gcc CACHE STRING "")
 set(CMAKE_CXX_FLAGS "-O2" CACHE STRING "")
 set(USE_PYTHON ON CACHE BOOL "")
 set(USE_PARAMS ON CACHE BOOL "")

cmake/toolchains/gnu_py.cmake

@@ -2,6 +2,7 @@
 # Basic Flags #
 ###############
 set(CMAKE_CXX_COMPILER g++ CACHE STRING "")
+set(CMAKE_CXX_COMPILER gcc CACHE STRING "")
 set(CMAKE_CXX_FLAGS "-O2" CACHE STRING "")
 set(USE_PARAMS OFF CACHE BOOL "")
 set(USE_PYTHON ON CACHE BOOL "")

cmake/toolchains/intel_base.cmake

@@ -2,6 +2,7 @@
 # Basic Flags #
 ###############
 set(CMAKE_CXX_COMPILER icpc CACHE STRING "")
+set(CMAKE_CXX_COMPILER icc CACHE STRING "")
 set(CMAKE_CXX_FLAGS "-O3" CACHE STRING "")
 set(USE_PARAMS OFF CACHE BOOL "")
 set(USE_PYTHON OFF CACHE BOOL "")

cmake/toolchains/intel_param.cmake

@@ -2,6 +2,7 @@
 # Basic Flags #
 ###############
 set(CMAKE_CXX_COMPILER icpc CACHE STRING "")
+set(CMAKE_CXX_COMPILER icc CACHE STRING "")
 set(CMAKE_CXX_FLAGS "-O3" CACHE STRING "")
 set(USE_PARAMS ON CACHE BOOL "")
 set(USE_PYTHON OFF CACHE BOOL "")

cmake/toolchains/intel_param_py.cmake

@@ -2,6 +2,7 @@
 # Basic Flags #
 ###############
 set(CMAKE_CXX_COMPILER icpc CACHE STRING "")
+set(CMAKE_CXX_COMPILER icc CACHE STRING "")
 set(CMAKE_CXX_FLAGS "-O3" CACHE STRING "")
 set(USE_PARAMS ON CACHE BOOL "")
 set(USE_PYTHON ON CACHE BOOL "")

cmake/toolchains/intel_py.cmake

@@ -2,6 +2,7 @@
 # Basic Flags #
 ###############
 set(CMAKE_CXX_COMPILER icpc CACHE STRING "")
+set(CMAKE_CXX_COMPILER icc CACHE STRING "")
 set(CMAKE_CXX_FLAGS "-O3" CACHE STRING "")
 set(USE_PARAMS OFF CACHE BOOL "")
 set(USE_PYTHON ON CACHE BOOL "")