attempt to extract compiler version from gcc on Macs

git-svn-id: svn://tug.org/texlive/trunk@51449 c570f23f-e606-0410-a88d-b1316a301751

2 files changed, 19 insertions, 5 deletions

diff --git a/Build/source/ChangeLog b/Build/source/ChangeLog
index 806699b0a65..692b91cf36c 100644
--- a/Build/source/ChangeLog
+++ b/Build/source/ChangeLog
@@ -1,3 +1,8 @@
+2019-06-24  Karl Berry  <karl@freefriends.org>
+
+	* doc/buildinfo.sh (compiler_version): new shell function;
+	 ignore useless first "Configured:" line for gcc->cc on Macs.
+
 2019-06-23  Karl Berry  <karl@freefriends.org>
 
 	* doc/buildinfo.sh: output the compiler/other names
diff --git a/Build/source/doc/buildinfo.sh b/Build/source/doc/buildinfo.sh
index 7784ae5061c..fe889022a8a 100755
--- a/Build/source/doc/buildinfo.sh
+++ b/Build/source/doc/buildinfo.sh
@@ -12,21 +12,30 @@ fi
 
 printf 'UNAME\t"%s"\n'    "`uname -a`"
 
-# /etc/issue often contains only placeholders, so don't bother.
+# /etc/issue often contains only placeholders, so don't bother with it.
+
+# Return version identification for $1, by calling it with --version.
+# gcc on Macs, when linked to cc, has a useless "Configured with:" as
+# the first line. Likely we'll need to generalize for other compilers.
+# We intentionally don't quote $1 in case CC was set to something like
+# "cc --someopt".
+compiler_version () {
+  $1 --version 2>&1 | grep -v '^Configured' | sed 1q
+}
 
 printf 'MAKE\t"%s"\n'     "${MAKE-make}"
 printf 'MAKE-v\t"%s"\n'   "`${MAKE-make} -v 2>&1 | sed 1q`"
 # BSD make does not give version info with -v, but the
 # first line of the usage message is sort of an identifier.
 
-# our configure defaults to using gcc and g++.
+# our configure defaults to using gcc and g++, so we will too.
 printf 'CC\t"%s"\n'       "${CC-gcc}"
 printf 'CFLAGS\t"%s"\n'   "${CFLAGS}"
-printf 'CC-v\t"%s"\n'     "`${CC-gcc} --version 2>&1 | sed 1q`"
-#
+printf 'CC-v\t"%s"\n'     "`compiler_version ${CC-gcc}`"
+# 
 printf 'CXX\t"%s"\n'      "${CXX-g++}"
 printf 'CXXFLAGS\t"%s"\n' "${CXXFLAGS}"
-printf 'CXX-v\t"%s"\n'    "`${CXX-g++} --version 2>&1 | sed 1q`"
+printf 'CXX-v\t"%s"\n'    "`compiler_version ${CXX-g++}`"
 #
 printf 'OBJCXX\t"%s"\n'      "${OBJCXX-cc}"
 printf 'OBJCXXFLAGS\t"%s"\n' "${OBJCXXFLAGS}"