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authorDavid Young <dyoung@hdfgroup.org>2019-11-05 16:14:59 (GMT)
committerDavid Young <dyoung@hdfgroup.org>2019-11-05 16:14:59 (GMT)
commitd459daa1f725cf24d3a0bdffdda7205cc9329d63 (patch)
tree1638a9699aec7e842ab16bb1cfd1f61fd03f7da0
parentb8a93a7224114739e42f32aaf62ae64fd1aad33e (diff)
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Make this script relocatable again: derive a relative path for the
original installation prefix from the examples prefix. Use that relative path to locate the current installation prefix, always. Fall back to an absolute installation prefix if the relative path cannot be derived.
-rw-r--r--examples/run-c-ex.sh.in27
1 files changed, 25 insertions, 2 deletions
diff --git a/examples/run-c-ex.sh.in b/examples/run-c-ex.sh.in
index ffb01bc..82050a1 100644
--- a/examples/run-c-ex.sh.in
+++ b/examples/run-c-ex.sh.in
@@ -28,10 +28,33 @@
# Initializations
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@"