From: Bruno Haible <bruno@clisp.org>
Date: Tue, 23 Oct 2018 22:31:23 +0000 (+0200)
Subject: examples: Avoid grepping through monster files.
X-Git-Tag: v0.20~295
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27d099cb4f81807726053ede9545b1897fff1d52;p=thirdparty%2Fgettext.git

examples: Avoid grepping through monster files.

This mirrors the Makefile.in.in change from 2010-06-12.

Reported by Jim Meyering <jim@meyering.net>.

* gettext-tools/examples/hello-*/po/Makefile.am (($(DOMAIN).pot-update): When
GNU find is available, avoid grepping through monster files.
* gettext-tools/examples/hello-objc-gnustep/po/GNUmakefile: Likewise.
---

diff --git a/gettext-tools/examples/hello-c++-qt/po/Makefile.am b/gettext-tools/examples/hello-c++-qt/po/Makefile.am
index cf0e60dfc..5e888de08 100644
--- a/gettext-tools/examples/hello-c++-qt/po/Makefile.am
+++ b/gettext-tools/examples/hello-c++-qt/po/Makefile.am
@@ -121,8 +121,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-c++-wxwidgets/po/Makefile.am b/gettext-tools/examples/hello-c++-wxwidgets/po/Makefile.am
index 7b7e84356..f38f0fd9d 100644
--- a/gettext-tools/examples/hello-c++-wxwidgets/po/Makefile.am
+++ b/gettext-tools/examples/hello-c++-wxwidgets/po/Makefile.am
@@ -128,8 +128,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-clisp/po/Makefile.am b/gettext-tools/examples/hello-clisp/po/Makefile.am
index cf4f69c4c..018cab0ba 100644
--- a/gettext-tools/examples/hello-clisp/po/Makefile.am
+++ b/gettext-tools/examples/hello-clisp/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-csharp-forms/po/Makefile.am b/gettext-tools/examples/hello-csharp-forms/po/Makefile.am
index 56279c59b..29356c961 100644
--- a/gettext-tools/examples/hello-csharp-forms/po/Makefile.am
+++ b/gettext-tools/examples/hello-csharp-forms/po/Makefile.am
@@ -110,8 +110,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-csharp/po/Makefile.am b/gettext-tools/examples/hello-csharp/po/Makefile.am
index 56279c59b..29356c961 100644
--- a/gettext-tools/examples/hello-csharp/po/Makefile.am
+++ b/gettext-tools/examples/hello-csharp/po/Makefile.am
@@ -110,8 +110,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-gawk/po/Makefile.am b/gettext-tools/examples/hello-gawk/po/Makefile.am
index 9616ee86e..c4afbdcf0 100644
--- a/gettext-tools/examples/hello-gawk/po/Makefile.am
+++ b/gettext-tools/examples/hello-gawk/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-guile/po/Makefile.am b/gettext-tools/examples/hello-guile/po/Makefile.am
index 8700f6084..49632ccba 100644
--- a/gettext-tools/examples/hello-guile/po/Makefile.am
+++ b/gettext-tools/examples/hello-guile/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-java-awt/po/Makefile.am b/gettext-tools/examples/hello-java-awt/po/Makefile.am
index 722f6f182..4bd40a3db 100644
--- a/gettext-tools/examples/hello-java-awt/po/Makefile.am
+++ b/gettext-tools/examples/hello-java-awt/po/Makefile.am
@@ -108,8 +108,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-java-qtjambi/po/Makefile.am b/gettext-tools/examples/hello-java-qtjambi/po/Makefile.am
index 722f6f182..4bd40a3db 100644
--- a/gettext-tools/examples/hello-java-qtjambi/po/Makefile.am
+++ b/gettext-tools/examples/hello-java-qtjambi/po/Makefile.am
@@ -108,8 +108,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-java-swing/po/Makefile.am b/gettext-tools/examples/hello-java-swing/po/Makefile.am
index 722f6f182..4bd40a3db 100644
--- a/gettext-tools/examples/hello-java-swing/po/Makefile.am
+++ b/gettext-tools/examples/hello-java-swing/po/Makefile.am
@@ -108,8 +108,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-java/po/Makefile.am b/gettext-tools/examples/hello-java/po/Makefile.am
index 722f6f182..4bd40a3db 100644
--- a/gettext-tools/examples/hello-java/po/Makefile.am
+++ b/gettext-tools/examples/hello-java/po/Makefile.am
@@ -108,8 +108,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-librep/po/Makefile.am b/gettext-tools/examples/hello-librep/po/Makefile.am
index a20b3c75f..2278db051 100644
--- a/gettext-tools/examples/hello-librep/po/Makefile.am
+++ b/gettext-tools/examples/hello-librep/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-objc-gnustep/po/GNUmakefile b/gettext-tools/examples/hello-objc-gnustep/po/GNUmakefile
index eda89818b..da4be355f 100644
--- a/gettext-tools/examples/hello-objc-gnustep/po/GNUmakefile
+++ b/gettext-tools/examples/hello-objc-gnustep/po/GNUmakefile
@@ -96,8 +96,16 @@ all-local-no:
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE_NAME)' ../* 2>/dev/null >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE_NAME)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE_NAME)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-pascal/po/Makefile.am b/gettext-tools/examples/hello-pascal/po/Makefile.am
index 5e3743f9e..e9c64d583 100644
--- a/gettext-tools/examples/hello-pascal/po/Makefile.am
+++ b/gettext-tools/examples/hello-pascal/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-perl/po/Makefile.am b/gettext-tools/examples/hello-perl/po/Makefile.am
index 5e7fe98d8..20133250e 100644
--- a/gettext-tools/examples/hello-perl/po/Makefile.am
+++ b/gettext-tools/examples/hello-perl/po/Makefile.am
@@ -132,8 +132,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-php/po/Makefile.am b/gettext-tools/examples/hello-php/po/Makefile.am
index b098d14a1..1c9ebf924 100644
--- a/gettext-tools/examples/hello-php/po/Makefile.am
+++ b/gettext-tools/examples/hello-php/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-python/po/Makefile.am b/gettext-tools/examples/hello-python/po/Makefile.am
index 584f078d4..27c50aea5 100644
--- a/gettext-tools/examples/hello-python/po/Makefile.am
+++ b/gettext-tools/examples/hello-python/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-sh/po/Makefile.am b/gettext-tools/examples/hello-sh/po/Makefile.am
index 606bc716e..18cfda678 100644
--- a/gettext-tools/examples/hello-sh/po/Makefile.am
+++ b/gettext-tools/examples/hello-sh/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-smalltalk/po/Makefile.am b/gettext-tools/examples/hello-smalltalk/po/Makefile.am
index 45a20a81f..3a6a8916b 100644
--- a/gettext-tools/examples/hello-smalltalk/po/Makefile.am
+++ b/gettext-tools/examples/hello-smalltalk/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-tcl-tk/po/Makefile.am b/gettext-tools/examples/hello-tcl-tk/po/Makefile.am
index fd4543295..d882e8c41 100644
--- a/gettext-tools/examples/hello-tcl-tk/po/Makefile.am
+++ b/gettext-tools/examples/hello-tcl-tk/po/Makefile.am
@@ -108,8 +108,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-tcl/po/Makefile.am b/gettext-tools/examples/hello-tcl/po/Makefile.am
index fd4543295..d882e8c41 100644
--- a/gettext-tools/examples/hello-tcl/po/Makefile.am
+++ b/gettext-tools/examples/hello-tcl/po/Makefile.am
@@ -108,8 +108,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \
diff --git a/gettext-tools/examples/hello-ycp/po/Makefile.am b/gettext-tools/examples/hello-ycp/po/Makefile.am
index 4d6286ad9..222d0e352 100644
--- a/gettext-tools/examples/hello-ycp/po/Makefile.am
+++ b/gettext-tools/examples/hello-ycp/po/Makefile.am
@@ -122,8 +122,16 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
+# The determination of whether the package xyz is a GNU one is based on the
+# heuristic whether some file in the top level directory mentions "GNU xyz".
+# If GNU 'find' is available, we avoid grepping through monster files.
 $(DOMAIN).pot-update: $(POTFILES_DEPS) remove-potcdate.sed
-	if LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
+	if { if (LC_ALL=C find --version) 2>/dev/null | grep GNU >/dev/null; then \
+	       LC_ALL=C find -L $(top_srcdir) -maxdepth 1 -type f -size -10000000c -exec grep 'GNU $(PACKAGE)' /dev/null '{}' ';' 2>/dev/null; \
+	     else \
+	       LC_ALL=C grep 'GNU $(PACKAGE)' $(top_srcdir)/* 2>/dev/null; \
+	     fi; \
+	   } | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
 	  package_gnu=''; \