add test program to package gsl

src/gsl-test.c

@@ -0,0 +1,18 @@
+/* This file is part of mingw-cross-env.       */
+/* See doc/index.html for further information. */
+
+#include <stdio.h>
+#include <gsl/gsl_sf_bessel.h>
+
+int main(int argc, char *argv[]) 
+{
+    double x, y;
+
+    (void)argc;
+    (void)argv;
+
+    x = 5.0;
+    y = gsl_sf_bessel_J0 (x);
+    printf ("J0(%g) = %.18e\n", x, y);
+    return 0;
+}

src/gsl.mk

@@ -27,4 +27,9 @@ define $(PKG)_BUILD
         --enable-static
     $(MAKE) -C '$(1)' -j '$(JOBS)'
     $(MAKE) -C '$(1)' -j 1 install
+    
+    '$(TARGET)-gcc' \
+        -W -Wall -Werror -ansi -pedantic \
+        '$(2).c' -o '$(PREFIX)/$(TARGET)/bin/test-gsl.exe' \
+        -lgsl
 endef