4c4
< # Assumes that CXX is set, and that a link to GMP header file is in ExternalLibs/include
---
> # Assumes that env variable CXX is set, and that a link to GMP header file is in $COCOA_EXTLIB_DIR/include
22c22
< if [ ! -d configuration ]
---
> if [ -z "$COCOA_EXTLIB_DIR" ]
24c24,36
<   echo "$0: ERROR: please run in the CoCoALib root directory"
---
>     echo "ERROR: $0: environment variable COCOA_EXTLIB_DIR not set."
>     exit 1
> fi
> 
> if [ \! "$COCOA_EXTLIB_DIR"  -ef "/$COCOA_EXTLIB_DIR" ]
> then
>   echo "ERROR: $0: environment variable COCOA_EXTLIB_DIR is not absolute: $COCOA_EXTLIB_DIR."
>   exit 1
> fi
> 
> if [ \! -d "$COCOA_EXTLIB_DIR" -o \! -d "$COCOA_EXTLIB_DIR/include" -o \! -d "$COCOA_EXTLIB_DIR/lib" ]
> then
>   echo "ERROR: $0: environment variable COCOA_EXTLIB_DIR is implausible: $COCOA_EXTLIB_DIR."
28d39
< umask 22
31,35c42,46
< # Create tmp directory, put C prog in it, compile, run, get output, delete directory.
< # TMP_DIR depends on hostname, userid, and process number to try to avoid unfortunate
< # name clashes if several people try to install CoCoALib simultaneously.
< TMP_DIR=configuration/gmp-version-$UID@$HOSTNAME-$$
< /bin/rm -rf $TMP_DIR && mkdir $TMP_DIR
---
> umask 22
> TODAY=`date "+%Y-%m-%d"`
> TIME=`date "+%H:%M:%S"`
> TMP_DIR=/tmp/CoCoALib-config-$USER-$TODAY/gmp-version-$TIME-$$
> /bin/rm -rf $TMP_DIR  &&  mkdir -p $TMP_DIR
37c48
<   echobox "ERROR: $0: failed to create temporary directory \"$TMP_DIR\"";
---
>   echo "ERROR: $0 failed to create temporary directory \"$TMP_DIR\""
40c51,53
< pushd $TMP_DIR >/dev/null
---
> 
> cd $TMP_DIR
> 
52c65
< $CXX -I ../ExternalLibs/include  TestProg.C -o TestProg 2> /dev/null
---
> $CXX -I "$COCOA_EXTLIB_DIR/include"  TestProg.C -o TestProg 2> /dev/null
57,60c70,71
<   echo "ERROR: unable to determine version of GMP library"   > /dev/stderr
<   echo "ERROR: (compilation failed in gmp-version.sh)"       > /dev/stderr
<   popd
<   /bin/rm -rf $TMP_DIR
---
>   echo "ERROR: $0: unable to determine version of GMP library"   > /dev/stderr
>   echo "ERROR: $0: (compilation failed in gmp-version.sh)"       > /dev/stderr
67c78,79
< popd >/dev/null
---
> # Clean up TMP_DIR
> cd # Leave TMP_DIR