[develop] Added environment variable LDFLAGS on macOS as requested by…

… the corresponding module file (ufs-community#729)

On macOS with GNU compiler, once the module file build_macos_gnu.lua is loaded, it outputs a message to request for setting environment variable LDFLAGS:

Please export env. variable LDFLAGS after the module is successfully loaded:
> export LDFLAGS="-L$MPI_ROOT/lib " "
%

When using script devbuild.sh however, it does not give users a chance to read/set this environment variable. Three lines in the script devbuild.sh were added, which will set this environment variable automatically when the module build_macos_gnu is detected.

if [[ "${MODULE_FILE}" == "build_macos_gnu" ]]; then
    export LDFLAGS+=" -L$MPI_ROOT/lib "
fi

This will make script devbuild.sh work on macOS as it does on other platforms and will also avoid a library not found error on macOS.

devbuild.sh

@@ -118,7 +118,7 @@ CONTINUE=false
 VERBOSE=false
 
 # Turn off all apps to build and choose default later
-DEFAULT_BUILD=true 
+DEFAULT_BUILD=true
 BUILD_UFS="off"
 BUILD_UFS_UTILS="off"
 BUILD_UPP="off"
@@ -263,7 +263,7 @@ fi
 RUN_VERSION_FILE="${SRW_DIR}/versions/run.ver.${PLATFORM}"
 if [ -f ${RUN_VERSION_FILE} ]; then
  . ${RUN_VERSION_FILE}
-fi 
+fi
 
 # set MODULE_FILE for this platform/compiler combination
 MODULE_FILE="build_${PLATFORM}_${COMPILER}"
@@ -352,7 +352,7 @@ if [ "${APPLICATION}" = "ATMAQ" ]; then
  cp "${SRW_DIR}/sorc/UFS_UTILS/modulefiles/build.${PLATFORM}.${COMPILER}.lua" "${EXTRN_BUILD_MOD_DIR}/mod_ufs-utils.lua"
  fi
  if [ "${BUILD_UPP}" = "on" ]; then
- cp "${SRW_DIR}/sorc/UPP/modulefiles/${PLATFORM}.lua" "${EXTRN_BUILD_MOD_DIR}/mod_upp.lua" 
+ cp "${SRW_DIR}/sorc/UPP/modulefiles/${PLATFORM}.lua" "${EXTRN_BUILD_MOD_DIR}/mod_upp.lua"
  fi
  if [ "${BUILD_NEXUS}" = "on" ]; then
  cp "${SRW_DIR}/sorc/AQM-utils/parm/nexus_modulefiles/${PLATFORM}.${COMPILER}.lua" "${EXTRN_BUILD_MOD_DIR}/mod_nexus.lua"
@@ -449,6 +449,9 @@ if [ $USE_SUB_MODULES = true ]; then
 else
  module use ${SRW_DIR}/modulefiles
  module load ${MODULE_FILE}
+ if [[ "${PLATFORM}" == "macos" ]]; then
+ export LDFLAGS+=" -L$MPI_ROOT/lib "
+ fi
 fi
 module list
 

modulefiles/build_macos_gnu.lua

@@ -60,7 +60,7 @@ setenv("FFLAGS", " -DNO_QUAD_PRECISION -fallow-argument-mismatch ")
 if mode() == "load" then
  LmodMsgRaw([===[
  Please export env. variable LDFLAGS after the module is successfully loaded:
- > export LDFLAGS=\"-L\$MPI_ROOT/lib \" "
+ > export LDFLAGS+=" -L$MPI_ROOT/lib " 
  ]===])
 end