diff --git a/configure.sh b/configure.sh
index bb7ed10..c395b55 100755
--- a/configure.sh
+++ b/configure.sh
@@ -4,18 +4,24 @@ LIBNAME="libcodata"
 NAME="codata"
 PYNAME="py$NAME"
 PY_SRC="./src/$PYNAME"
+C_SRC="./C/src/"
 
 # environment variables
 FC=gfortran
+CC=gcc
 BUILD_DIR="./build"
 INCLUDE_DIR="./include"
 FPM_FFLAGS="-std=f2008 -pedantic -Wall -Wextra"
 FPM_CFLAGS="-std=c11 -pedantic -Wall -Wextra"
 FPM_LDFLAGS=""
+CFLAGS_RELEASE="-fPIC -O3 -funroll-loops"
+CFLAGS_DEBUG="-fPIC -g"
 DEFAULT_INSTALL_DIR="$HOME/.local"
 PLATFORM="linux"
 EXT=".so"
 
+
+echo "Detecting platform..."
 if [[ "$OSTYPE" == "msys" ]]; then
     DEFAULT_INSTALL_DIR="${APPDATA//\\//}/local"
     PLATFORM="windows"
@@ -31,41 +37,52 @@ if [[ "$OSTYPE" == "darwin"* ]];then
     LIBS=( "${LIBSDARWIN[@]}" )
 fi
 
+
+echo "Copying version and license..."
 cp -f VERSION ./py/VERSION
 cp -f LICENSE ./py/LICENSE
 cp -f VERSION ./C/VERSION
 cp -f LICENSE ./C/LICENSE
 
-export LIBNAME
-echo "LIBNAME=" $LIBNAME
 
+echo "Exporting env variables..."
+export LIBNAME
 export NAME
-echo "NAME=" $NAME
-
 export PLATFORM
-echo "PLATFORM=" $PLATFORM
-
 export FPM_FFLAGS
-echo "FPM_FFLAGS=" $FPM_FFLAGS
-
 export FPM_CFLAGS
-echo "FPM_CFLAGS=" $FPM_CFLAGS
-
 export FPM_LDFLAGS
-echo "FPM_LDFLAGS=" $FPM_LDFLAGS
-
+export CFLAGS_DEBUG
+export CFLAGS_RELEASE
 export DEFAULT_INSTALL_DIR
-echo "DEFAULT INSTALL DIR=" $DEFAULT_INSTALL_DIR
-
 export BUILD_DIR
-echo "BUILD DIR=" $BUILD_DIR
-
 export INCLUDE_DIR
-echo "INCLUDE_DIR=" $INCLUDE_DIR
-
 export PY_SRC
-echo "PY_SRC=" $PY_SRC
-
+export C_SRC
 export FC
-echo "FC=" $FC
+export CC
+
+echo "##### COMMON SETTINGS #####"
+echo "* LIBNAME=" $LIBNAME
+echo "* NAME=" $NAME
+echo "* PLATFORM=" $PLATFORM
+
+echo "##### FPM SETTINGS #####"
+echo "* FPM_FFLAGS=" $FPM_FFLAGS
+echo "* FPM_CFLAGS=" $FPM_CFLAGS
+echo "* FPM_LDFLAGS=" $FPM_LDFLAGS
+echo "* CFLAGS_DEBUG=" $CFLAGS_DEBUG
+echo "* CFLAGS_RELEASE=" $CFLAGS_RELEASE
+
+echo "##### INSTALLATION SETTINGS #####"
+echo "* DEFAULT INSTALL DIR=" $DEFAULT_INSTALL_DIR
+echo "* BUILD DIR=" $BUILD_DIR
+echo "* INCLUDE_DIR=" $INCLUDE_DIR
+
+echo "##### PYTHON SETTINGS #####"
+echo "* PY_SRC=" $PY_SRC
+
+echo "##### COMPILERS #####"
+echo "* FC=" $FC
+echo "* CC=" $CC