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-rw-r--r--fortran/examples/run-fortran-ex.sh.in25
1 files changed, 24 insertions, 1 deletions
diff --git a/fortran/examples/run-fortran-ex.sh.in b/fortran/examples/run-fortran-ex.sh.in
index 8ea4dc3..e2b444f 100644
--- a/fortran/examples/run-fortran-ex.sh.in
+++ b/fortran/examples/run-fortran-ex.sh.in
@@ -30,9 +30,32 @@
EXIT_SUCCESS=0
EXIT_FAILURE=1
+#
+# Try to derive the path to the installation $prefix established
+# by ./configure relative to the examples directory established by
+# ./configure. If successful, set `prefix_relto_examplesdir` to the
+# relative path. Otherwise, set `prefix_relto_examplesdir` to the
+# absolute installation $prefix.
+#
+# This script uses the value of `prefix` in the user's environment, if
+# it is set, below. The content of $() is evaluated in a sub-shell, so
+# if `prefix` is set in the user's environment, the shell statements in
+# $() won't clobbered it.
+#
+prefix_relto_examplesdir=$(
+prefix=@prefix@
+examplesdir=@examplesdir@
+if [ ${examplesdir##${prefix}/} != ${examplesdir} ]; then
+ echo $(echo ${examplesdir##${prefix}/} | \
+ sed -E 's,[^/]+,..,g')
+else
+ echo $prefix
+fi
+)
+
# Where the tool is installed.
# default is relative path to installed location of the tools
-prefix="${prefix:-@prefix@}"
+prefix="${prefix:-../${prefix_relto_examplesdir}}"
PARALLEL=@PARALLEL@ # Am I in parallel mode?
AR="@AR@"
RANLIB="@RANLIB@"