[PATCH 2/1] config: do not define DEBUGINFOD_URLS environment variable unnecessarily

[Dmitry V. Levin]

Before this change, when elfutils was configured without
--enable-debuginfod-urls, the installed profile.d/debuginfod.sh and
profile.d/debuginfod.csh scripts used to define the DEBUGINFOD_URLS
environment variable as an non-empty string containing spaces, making
all libdebuginfod users do extra work.

Change these scripts to avoid defining the DEBUGINFOD_URLS environment
variable unless configured using --enable-debuginfod-urls.

Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
---
 config/ChangeLog      |  5 +++++
 config/profile.csh.in | 13 +++++++++++--
 config/profile.sh.in  |  7 ++++---
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/config/ChangeLog b/config/ChangeLog
index e69e7e21..e4da0ebc 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,8 @@
+2020-11-04  Dmitry V. Levin  <ldv@altlinux.org>
+
+	* profile.sh.in, profile.csh.in: Do not define $DEBUGINFOD_URLS unless
+	configured using --enable-debuginfod-urls.
+
 2020-11-02  Dmitry V. Levin  <ldv@altlinux.org>
 
 	* Makefile.am (pkgconfig_DATA, install-data-local, uninstall-local):
diff --git a/config/profile.csh.in b/config/profile.csh.in
index 4f25896d..0a2d6d16 100644
--- a/config/profile.csh.in
+++ b/config/profile.csh.in
@@ -1,2 +1,11 @@
-
-setenv DEBUGINFOD_URLS "$DEBUGINFOD_URLS @DEBUGINFOD_URLS@"
+if ("@DEBUGINFOD_URLS@" != "") then
+	if ($?DEBUGINFOD_URLS) then
+		if ($%DEBUGINFOD_URLS) then
+			setenv DEBUGINFOD_URLS "$DEBUGINFOD_URLS @DEBUGINFOD_URLS@"
+		else
+			setenv DEBUGINFOD_URLS "@DEBUGINFOD_URLS@"
+		endif
+	else
+		setenv DEBUGINFOD_URLS "@DEBUGINFOD_URLS@"
+	endif
+endif
diff --git a/config/profile.sh.in b/config/profile.sh.in
index 8a022489..aa228a0d 100644
--- a/config/profile.sh.in
+++ b/config/profile.sh.in
@@ -1,3 +1,4 @@
-
-DEBUGINFOD_URLS="$DEBUGINFOD_URLS @DEBUGINFOD_URLS@"
-export DEBUGINFOD_URLS
+if [ -n "@DEBUGINFOD_URLS@" ]; then
+	DEBUGINFOD_URLS="${DEBUGINFOD_URLS-}${DEBUGINFOD_URLS:+ }@DEBUGINFOD_URLS@"
+	export DEBUGINFOD_URLS
+fi

-- 
ldv