build system: GCC >= 4.6 warnings

git-svn-id: svn://tug.org/texlive/trunk@25483 c570f23f-e606-0410-a88d-b1316a301751

12 files changed, 86 insertions, 13 deletions

diff --git a/Build/source/configure b/Build/source/configure
index 0776bd842ae..728beddf980 100755
--- a/Build/source/configure
+++ b/Build/source/configure
@@ -19544,7 +19544,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(
diff --git a/Build/source/libs/graphite/configure b/Build/source/libs/graphite/configure
index f86f3aa9e73..5201c608c5b 100755
--- a/Build/source/libs/graphite/configure
+++ b/Build/source/libs/graphite/configure
@@ -4477,7 +4477,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(
diff --git a/Build/source/libs/poppler/configure b/Build/source/libs/poppler/configure
index b268220c4f6..de0a45fc3aa 100755
--- a/Build/source/libs/poppler/configure
+++ b/Build/source/libs/poppler/configure
@@ -4277,7 +4277,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(
diff --git a/Build/source/libs/teckit/configure b/Build/source/libs/teckit/configure
index 69ac4acaeba..fb2670de491 100755
--- a/Build/source/libs/teckit/configure
+++ b/Build/source/libs/teckit/configure
@@ -4509,7 +4509,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(
diff --git a/Build/source/libs/xpdf/configure b/Build/source/libs/xpdf/configure
index b479803ce6d..b9b8e969b76 100755
--- a/Build/source/libs/xpdf/configure
+++ b/Build/source/libs/xpdf/configure
@@ -4258,7 +4258,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(
diff --git a/Build/source/m4/ChangeLog b/Build/source/m4/ChangeLog
index 4f00f78ca13..6bf15a07fc5 100644
--- a/Build/source/m4/ChangeLog
+++ b/Build/source/m4/ChangeLog
@@ -1,3 +1,7 @@
+2012-02-23  Peter Breitenlohner  <peb@mppmu.mpg.de>
+
+	* kpse-warnings.m4: Drop `-Wimplicit' for g++ >= 4.6.
+
 2012-01-16  Peter Breitenlohner  <peb@mppmu.mpg.de>
 
 	* kpse-setup.m4 (KPSE_SETUP): Normalize `enable_largefile'.
diff --git a/Build/source/m4/kpse-warnings.m4 b/Build/source/m4/kpse-warnings.m4
index 21127cb5466..763e0bb7373 100644
--- a/Build/source/m4/kpse-warnings.m4
+++ b/Build/source/m4/kpse-warnings.m4
@@ -1,5 +1,5 @@
 # Public macros for the TeX Live (TL) tree.
-# Copyright (C) 2009-2011 Peter Breitenlohner <tex-live@tug.org>
+# Copyright (C) 2009-2012 Peter Breitenlohner <tex-live@tug.org>
 #
 # This file is free software; the copyright holders
 # give unlimited permission to copy and/or distribute it,
@@ -174,7 +174,10 @@ m4_define([_KPSE_WARNING_GNU_CXXFLAGS],
 [kpse_cv_warning_$2=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_$2="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_$2="-Wreturn-type"
+  AS_CASE([`$[]$1 -dumpversion`],
+          [3.* | 4.@<:@012345@:>@.*],
+          [kpse_cv_warning_$2="-Wimplicit $kpse_cv_warning_$2"])
   AS_CASE([`$[]$1 -dumpversion`],
           [3.@<:@234@:>@.* | 4.*],
           [kpse_cv_warning_$2="$kpse_cv_warning_$2 -Wno-unknown-pragmas"])
diff --git a/Build/source/texk/bibtexu/configure b/Build/source/texk/bibtexu/configure
index 39e9dcfd270..d81fb5e3f7c 100755
--- a/Build/source/texk/bibtexu/configure
+++ b/Build/source/texk/bibtexu/configure
@@ -16387,7 +16387,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(
diff --git a/Build/source/texk/dvisvgm/configure b/Build/source/texk/dvisvgm/configure
index 74d09ae5b6d..df1b950a9aa 100755
--- a/Build/source/texk/dvisvgm/configure
+++ b/Build/source/texk/dvisvgm/configure
@@ -16444,7 +16444,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(
diff --git a/Build/source/texk/lcdf-typetools/configure b/Build/source/texk/lcdf-typetools/configure
index 34d611ae11e..c65577f92b9 100755
--- a/Build/source/texk/lcdf-typetools/configure
+++ b/Build/source/texk/lcdf-typetools/configure
@@ -16745,7 +16745,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(
diff --git a/Build/source/texk/web2c/configure b/Build/source/texk/web2c/configure
index faf47c7c9fa..d37f46966b9 100755
--- a/Build/source/texk/web2c/configure
+++ b/Build/source/texk/web2c/configure
@@ -16908,7 +16908,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(
@@ -17198,7 +17204,13 @@ else
   kpse_cv_warning_objcxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_objcxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_objcxxflags="-Wreturn-type"
+  case `$OBJCXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_objcxxflags="-Wimplicit $kpse_cv_warning_objcxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$OBJCXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_objcxxflags="$kpse_cv_warning_objcxxflags -Wno-unknown-pragmas" ;; #(
diff --git a/Build/source/texk/xdv2pdf/configure b/Build/source/texk/xdv2pdf/configure
index e7d891ec1a3..1bb3563997f 100755
--- a/Build/source/texk/xdv2pdf/configure
+++ b/Build/source/texk/xdv2pdf/configure
@@ -16344,7 +16344,13 @@ else
   kpse_cv_warning_cxxflags=
 kpse_warn_strings="-Wno-write-strings"
 if test "x$enable_compiler_warnings" != xno; then
-  kpse_cv_warning_cxxflags="-Wimplicit -Wreturn-type"
+  kpse_cv_warning_cxxflags="-Wreturn-type"
+  case `$CXX -dumpversion` in #(
+  3.* | 4.[012345].*) :
+    kpse_cv_warning_cxxflags="-Wimplicit $kpse_cv_warning_cxxflags" ;; #(
+  *) :
+     ;;
+esac
   case `$CXX -dumpversion` in #(
   3.[234].* | 4.*) :
     kpse_cv_warning_cxxflags="$kpse_cv_warning_cxxflags -Wno-unknown-pragmas" ;; #(