Set LC_ALL=C instead of LANG=C

doc/public/check-doc-coverage.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
-LANG=C
+LC_ALL=C
+export LC_ALL
+
 if test -z "$DOC_MODULE"; then
 	# extract from Makefile
 	eval `grep '^DOC_MODULE' Makefile | sed 's/ //g'`

doc/public/check-doc-syntax.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
-LANG=C
+LC_ALL=C
+export LC_ALL
 
 test -z "$srcdir" && srcdir=.
 test -z "$top_srcdir" && top_srcdir=$srcdir/../..

src/check-def.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
-LANG=C
+LC_ALL=C
+export LC_ALL
 
 if which nm 2>/dev/null >/dev/null; then
 	:

src/check-doc-syntax.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
-LANG=C
+LC_ALL=C
+export LC_ALL
 
 if grep --version 2>/dev/null | grep GNU >/dev/null; then
 	:

src/check-headers.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
-LANG=C
+LC_ALL=C
+export LC_ALL
 
 test -z "$srcdir" && srcdir=.
 stat=0

src/check-plt.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
-LANG=C
+LC_ALL=C
+export LC_ALL
 
 if which readelf 2>/dev/null >/dev/null; then
 	:

src/check-preprocessor-syntax.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
-LANG=C
+LC_ALL=C
+export LC_ALL
 
 test -z "$srcdir" && srcdir=.
 cd "$srcdir"