#16274: include system pkgconfig path
-------------------------------------+-------------------------------------
Reporter: vbraun | Owner:
Type: defect | Status: needs_review
Priority: blocker | Milestone: sage-6.2
Component: build | Resolution:
Keywords: | Merged in:
Authors: Volker Braun | Reviewers: Leif Leonhardy
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vbraun/include_system_pkgconfig_path|
0afd5c5aaaf349c4314c5067800924c24a9e2713
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by leif):
Ah, yes:
{{{
If the name is neither a shell function nor a builtin, and
contains no
slashes, bash searches each element of the PATH for a directory
con‐
taining an executable file by that name. Bash uses a hash
table to
remember the full pathnames of executable files (see hash under
SHELL
BUILTIN COMMANDS below). A full search of the directories in
PATH is
performed only if the command is not found in the hash table. [...]
}}}
(And subshells inherit the cache.)
[[BR]]
{{{
#!diff
diff --git a/build/pkgs/pkgconf/spkg-install b/build/pkgs/pkgconf/spkg-
install
index e31009b..166008e 100755
--- a/build/pkgs/pkgconf/spkg-install
+++ b/build/pkgs/pkgconf/spkg-install
@@ -38,8 +38,17 @@ if [ $? -ne 0 ]; then
fi
# pkgconf is an alternative to the "official" pkg-config, and does not
-# automatically install a "pkg-config" binary.
-rm -f "$SAGE_LOCAL/bin/pkg-config" # delete old version
+# automatically install a "pkg-config" binary, so we used to install
+# a symbolic link (now replaced by a wrapper script).
+rm -f "$SAGE_LOCAL/bin/pkg-config" # delete old version (script or
symlink)
+
+# Let bash forget where it previously saw 'pkg-config', otherwise we
might
+# end up in an infinite loop if 'command -v pkg-config' gives Sage's
script,
+# such that the below generated script finally calls itself:
+builtin hash -d pkg-config 2>/dev/null
+
+# Generate a wrapper script which either calls Sage's 'pkgconf' or a
system-
+# wide 'pkg-config' if present (hardcoding its location at creation
time):
m4 ../patches/pkg-config.in > "$SAGE_LOCAL/bin/pkg-config"
if [ $? -ne 0 ]; then
echo >&2 "Error creating the pkg-config script."
}}}
doesn't yet work for me...
--
Ticket URL: <http://trac.sagemath.org/ticket/16274#comment:32>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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