1 files changed, 88 insertions, 0 deletions
diff --git a/bs/mkconfig-header.sh b/bs/mkconfig-header.sh
new file mode 100755
index 000000000..ff0809ffb
--- /dev/null
+++ b/bs/mkconfig-header.sh
@@ -0,0 +1,88 @@
+#!/bin/sh
+# detect the uninteresting (unlikely to be manually changed by the user)
+# parts of config.h
+
+if test -z "$O" || ! cd "$O"; then
+	echo '$O= not defined or not a directory' >&2
+	exit 1
+fi
+
+> config_detected.mk
+
+ansi_headers='assert ctype errno limits locale math signal
+stdarg stddef stdint stdio stdlib string'
+common_headers='dlfcn inttypes memory strings sched
+sys/inttypes sys/stat sys/types unistd'
+
+all_ansi=t
+echo '/* ANSI C headers: */'
+for h in $ansi_headers; do
+	if test x$h = xlocale; then
+		H=HAVE_LOCALE
+	else
+		H="HAVE_`echo $h | tr a-z A-Z | tr / _`_H"
+	fi
+	cat > t.c <<EOF
+#include <$h.h>
+int main(void) { return 0; }
+EOF
+	if $CC -o t.o $CFLAGS $CPPFLAGS t.c >> out 2>&1; then
+		echo "#define $H 1"
+		echo "$H := 1" >> config_detected.mk
+	else
+		echo "/* #undef $H */"
+		echo "# $H := " >> config_detected.mk
+		all_ansi=
+	fi
+done
+if test x$all_ansi = xt; then
+	echo '#define STDC_HEADERS 1'
+else
+	echo '/* #undef STDC_HEADERS */'
+fi
+echo ''
+echo '/* common system headers/features on UNIX and UNIX-like system: */'
+for h in $common_headers; do
+	H="HAVE_`echo $h | tr a-z A-Z | tr / _`_H"
+	cat > t.c <<EOF
+#include <$h.h>
+int main(void) { return 0; }
+EOF
+	if $CC -o t.o $CFLAGS $CPPFLAGS t.c >> out 2>&1; then
+		echo "#define $H 1"
+		echo "$H := 1" >> config_detected.mk
+	else
+		echo "/* #undef $H */"
+		echo "# $H :=" >> config_detected.mk
+	fi
+done
+
+# test for setenv
+cat > t.c <<EOF
+#include <stdlib.h>
+int main(void) { setenv("mpd","rocks", 1); return 0; }
+EOF
+if $CC -o t.o $CFLAGS $CPPFLAGS t.c >> out 2>&1; then
+	echo '#define HAVE_SETENV 1'
+	echo "HAVE_SETENV := 1" >> config_detected.mk
+else
+	echo '/* #undef HAVE_SETENV */'
+	echo "# HAVE_SETENV :=" >> config_detected.mk
+fi
+echo ''
+
+# test for alloca
+cat > t.c <<EOF
+#include <alloca.h>
+int main(void) { char *x = (char *)alloca(2 * sizeof(int)); return 0; }
+EOF
+if $CC -o t.o $CFLAGS $CPPFLAGS t.c >> out 2>&1; then
+	echo '#define HAVE_ALLOCA_H 1'
+	echo "HAVE_ALLOCA_H := 1" >> config_detected.mk
+else
+	echo '/* #undef HAVE_ALLOCA_H */'
+	echo "# HAVE_ALLOCA_H :=" >> config_detected.mk
+fi
+echo ''
+
+exec rm -f out t.c t.o