diff --git a/.circleci/config.yml b/.circleci/config.yml
index 1acb42d..5ca7eea 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -104,7 +104,7 @@ jobs:
     environment:
       WORKDIR: "test_macos_libcf_py2"
       PY_VER: "py2"
-      CONDA_COMPILER: "gcc"
+      CONDA_COMPILER: "clang_osx-64"
     steps:
       - checkout
       - run: *setup_miniconda
@@ -125,7 +125,7 @@ jobs:
     environment:
       WORKDIR: "test_macos_libcf_py3"
       PY_VER: "py3"
-      CONDA_COMPILER: "gcc"
+      CONDA_COMPILER: "clang_osx-64"
     steps:
       - checkout
       - run: *setup_miniconda
diff --git a/cf_config.h b/cf_config.h
index e851de2..9710cf6 100644
--- a/cf_config.h
+++ b/cf_config.h
@@ -21,10 +21,10 @@
 
 /* Define to a macro mangling the given C identifier (in lower and upper
    case), which must not contain underscores, for linking with Fortran. */
-/* #undef FC_FUNC */
+#define FC_FUNC(name,NAME) name ## _
 
 /* As FC_FUNC, but for C identifiers containing underscores. */
-/* #undef FC_FUNC_ */
+#define FC_FUNC_(name,NAME) name ## _
 
 /* Define to 1 if you have `alloca', as a function or macro. */
 #define HAVE_ALLOCA 1
@@ -70,7 +70,7 @@
 #define HAVE_STRING_H 1
 
 /* Define this if you have strlcat() */
-/* #undef HAVE_STRLCAT */
+#define HAVE_STRLCAT 1
 
 /* Define to 1 if `st_blksize' is a member of `struct stat'. */
 #define HAVE_STRUCT_STAT_ST_BLKSIZE 1
diff --git a/recipe/build.sh b/recipe/build.sh
index 0edcaff..4f7f3ff 100644
--- a/recipe/build.sh
+++ b/recipe/build.sh
@@ -1,10 +1,15 @@
-#source activate "${CONDA_DEFAULT_ENV}"
-export CFLAGS="-Wall -m64 -pipe -O2  -fPIC ${CFLAGS}"
+export CFLAGS="-Wall -m64 -pipe -O2  -fPIC -I${PREFIX}/include ${CFLAGS}"
 export CXXFLAGS="${CFLAGS} ${CXXFLAGS}"
 export CPPFLAGS="-I${PREFIX}/include ${CPPFLAGS}"
 export LDFLAGS="-L${PREFIX}/lib ${LDFLAGS}"
 export LFLAGS="-fPIC ${LFLAGS}"
 export FC=""
+# needed for clang_osx-64
+if [ ${HOME} == "/Users/distiller" ]; then
+    export CFLAGS="-Wl,-syslibroot / -isysroot / ${CFLAGS}"
+    # configure need this otherwise "error.h" is not found and configure report netcdf.h 
+    export CPPFLAGS="-Wl,-syslibroot / -isysroot / -I${PREFIX}/include ${CPPFLAGS}"
+fi
 ./configure --prefix=${PREFIX}
 make
 make install
diff --git a/recipe/meta.yaml.in b/recipe/meta.yaml.in
index c89090a..3aeb840 100644
--- a/recipe/meta.yaml.in
+++ b/recipe/meta.yaml.in
@@ -30,6 +30,8 @@ requirements:
     - curl >=7.44.0,<8
     - python
     - libuuid
+    - libblas
+    - libcblas
 
 test:
   imports: