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Subject[PATCH] ver_linux: Query ld cache for versions of libc/libcpp run-time
Date
Query ld cache for versions of both libc and libcpp run-time, instead
of querying /proc/self/maps for libc run-time, and ld cache for libcpp
run-time, thus reducing code size and complexity.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
---
scripts/ver_linux | 24 +++++++-----------------
1 file changed, 7 insertions(+), 17 deletions(-)

diff --git a/scripts/ver_linux b/scripts/ver_linux
index 85005d6b7f10..0968a3070eff 100755
--- a/scripts/ver_linux
+++ b/scripts/ver_linux
@@ -14,6 +14,8 @@ BEGIN {
printf("\n")

vernum = "[0-9]+([.]?[0-9]+)+"
+ libc = "libc[.]so[.][0-9]+$"
+ libcpp = "(libg|stdc)[+]+[.]so[.][0-9]+$"

printversion("GNU C", version("gcc -dumpversion"))
printversion("GNU Make", version("make --version"))
@@ -35,26 +37,14 @@ BEGIN {
printversion("Bison", version("bison --version"))
printversion("Flex", version("flex --version"))

- while (getline <"/proc/self/maps" > 0) {
- if (/libc.*\.so$/) {
- n = split($0, procmaps, "/")
- if (match(procmaps[n], vernum)) {
- ver = substr(procmaps[n], RSTART, RLENGTH)
- printversion("Linux C Library", ver)
- break
- }
- }
+ while ("ldconfig -p 2>/dev/null" | getline > 0) {
+ if ($NF ~ libc && !seen[ver = version("readlink " $NF)]++)
+ printversion("Linux C Library", ver)
+ else if ($NF ~ libcpp && !seen[ver = version("readlink " $NF)]++)
+ printversion("Linux C++ Library", ver)
}

printversion("Dynamic linker (ldd)", version("ldd --version"))
-
- while ("ldconfig -p 2>/dev/null" | getline > 0) {
- if (/(libg|stdc)[+]+\.so/) {
- libcpp = $NF
- break
- }
- }
- printversion("Linux C++ Library", version("readlink " libcpp))
printversion("Procps", version("ps --version"))
printversion("Net-tools", version("ifconfig --version"))
printversion("Kbd", version("loadkeys -V"))
--
2.25.0
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