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-rw-r--r--Build/source/m4/ChangeLog10
-rw-r--r--Build/source/m4/kpse-visibility.m48
2 files changed, 14 insertions, 4 deletions
diff --git a/Build/source/m4/ChangeLog b/Build/source/m4/ChangeLog
index ca963326323..63200884121 100644
--- a/Build/source/m4/ChangeLog
+++ b/Build/source/m4/ChangeLog
@@ -1,3 +1,11 @@
+2017-12-02 Karl Berry <karl@freefriends.org>
+
+ * kpse-visibility.m4 (KPSE_COMPILER_VISIBILITY): write debug line.
+ (_KPSE_VISIBILITY_FLAGS): only restore from kpse_save_flags
+ if we set it, i.e., if not using the cached value. (Otherwise,
+ e.g., in libpng, we can end up overriding the user-set CFLAGS with
+ the empty string.)
+
2017-11-02 Karl Berry <karl@freefriends.org>
* kpse-setup.m4 (_KPSE_RECURSE): revert previous change,
@@ -5,7 +13,7 @@
and (2) for 2018, more packages (icu, poppler, ...) are going to
require C++11, so we can't hack around it again. So not worth
spending more time refining.
- Also, add debugging line writing to >&AS_MESSAGE_LOG_FD (config.log).
+ Also, write debug line to >&AS_MESSAGE_LOG_FD (config.log).
reautoconf.
2017-02-17 Karl Berry <karl@freefriends.org>
diff --git a/Build/source/m4/kpse-visibility.m4 b/Build/source/m4/kpse-visibility.m4
index 8eeb029cc58..452e354d08e 100644
--- a/Build/source/m4/kpse-visibility.m4
+++ b/Build/source/m4/kpse-visibility.m4
@@ -1,5 +1,7 @@
+# $Id$
# Public macros for the TeX Live (TL) tree.
-# Copyright (C) 2013, 2014 Peter Breitenlohner <tex-live@tug.org>
+# Copyright 2017 Karl Berry <tex-live@tug.org>
+# Copyright 2013-2014 Peter Breitenlohner <tex-live@tug.org>
#
# This file is free software; the copyright holder
# gives unlimited permission to copy and/or distribute it,
@@ -13,6 +15,7 @@
# them a Makefile.am must use them, e.g., in AM_CFLAGS or AM_CXXFLAGS.
AC_DEFUN([KPSE_COMPILER_VISIBILITY],
[dnl arrange that AC_PROG_CC uses _KPSE_VISIBILITY_CFLAGS etc.
+echo 'dbg:[_KPSE_COMPILER_VISIBILITY] called.' >&AS_MESSAGE_LOG_FD
AC_PROVIDE_IFELSE([AC_PROG_CC],
[_KPSE_VISIBILITY_CFLAGS],
[m4_define([AC_PROG_CC],
@@ -64,11 +67,10 @@ for kpse_flag in '-fvisibility=hidden -fvisibility-inlines-hidden' '-fvisibility
AS_TR_CPP($2)="$kpse_save_flags -Werror $kpse_flag"
AC_COMPILE_IFELSE([], [kpse_cv_visibility_$2=$kpse_flag; break])
done
+AS_TR_CPP($2)=$kpse_save_flags
AC_LANG_POP([$1])
])
-AS_TR_CPP($2)=$kpse_save_flags
AS_CASE([$kpse_cv_visibility_$2],
[unknown], [],
[AC_SUBST([VISIBILITY_]AS_TR_CPP($2), [$kpse_cv_visibility_$2])])
]) # _KPSE_VISIBILITY_FLAGS
-