Merge pull request matplotlib#1725 from dmcdougall/fix_compiler_warnings

Fix compiler warnings

Author: mdboom

setupext.py

@@ -1030,7 +1030,7 @@ def add_tk_flags(module):
                 if not exists(join(F, fw + '.framework')):
                     break
             else:
-                # ok, F is now directory with both frameworks. Continure
+                # ok, F is now directory with both frameworks. Continue
                 # building
                 tk_framework_found = 1
                 break

src/_backend_agg.cpp

@@ -39,6 +39,13 @@
 
 #include "numpy/arrayobject.h"
 #include "agg_py_transforms.h"
+
+// This C function resides in npy_3kcompat.h and is unused by
+// matplotlib. This is here so that the compiler doesn't complain
+// that it is unused.
+extern "C" {
+__attribute__((unused)) static void simple_capsule_dtor(void *ptr);
+}
 #include "file_compat.h"
 
 #ifndef M_PI
@@ -2048,7 +2055,9 @@ RendererAgg::write_rgba(const Py::Tuple& args)
     {
         if (fwrite(pixBuffer, 1, NUMBYTES, fp) != NUMBYTES)
         {
-            npy_PyFile_DupClose(py_file, fp);
+            if (npy_PyFile_DupClose(py_file, fp)) {
+              throw Py::RuntimeError("Error closing dupe file handle");
+            }
 
             if (close_file) {
                 npy_PyFile_CloseFile(py_file);
@@ -2058,7 +2067,9 @@ RendererAgg::write_rgba(const Py::Tuple& args)
             throw Py::RuntimeError("Error writing to file");
         }
 
-        npy_PyFile_DupClose(py_file, fp);
+        if (npy_PyFile_DupClose(py_file, fp)) {
+          throw Py::RuntimeError("Error closing dupe file handle");
+        }
 
         if (close_file) {
             npy_PyFile_CloseFile(py_file);

src/_image.cpp

@@ -406,10 +406,6 @@ Image::resize(const Py::Tuple& args, const Py::Dict& kwargs)
 
     typedef agg::span_allocator<agg::rgba8> span_alloc_type;
     span_alloc_type sa;
-    agg::rgba8 background(agg::rgba8(int(255*bg.r),
-                                     int(255*bg.g),
-                                     int(255*bg.b),
-                                     int(255*bg.a)));
 
     // the image path
     agg::path_storage path;

src/_png.cpp

@@ -27,6 +27,13 @@
 #include "CXX/Extensions.hxx"
 #include "numpy/arrayobject.h"
 #include "mplutils.h"
+
+// This C function resides in npy_3kcompat.h and is unused by
+// matplotlib. This is here so that the compiler doesn't complain
+// that it is unused.
+extern "C" {
+__attribute__((unused)) static void simple_capsule_dtor(void *ptr);
+}
 #include "file_compat.h"
 
 // As reported in [3082058] build _png.so on aix
@@ -239,7 +246,9 @@ Py::Object _png_module::write_png(const Py::Tuple& args)
 
         if (close_dup_file)
         {
-            npy_PyFile_DupClose(py_file, fp);
+            if (npy_PyFile_DupClose(py_file, fp)) {
+              throw Py::RuntimeError("Error closing dupe file handle");
+            }
         }
 
         if (close_file)
@@ -258,7 +267,9 @@ Py::Object _png_module::write_png(const Py::Tuple& args)
     delete [] row_pointers;
     if (close_dup_file)
     {
-        npy_PyFile_DupClose(py_file, fp);
+        if (npy_PyFile_DupClose(py_file, fp)) {
+          throw Py::RuntimeError("Error closing dupe file handle");
+        }
     }
 
     if (close_file)
@@ -569,7 +580,9 @@ _png_module::_read_png(const Py::Object& py_fileobj, const bool float_result,
 #endif
     if (close_dup_file)
     {
-        npy_PyFile_DupClose(py_file, fp);
+        if (npy_PyFile_DupClose(py_file, fp)) {
+          throw Py::RuntimeError("Error closing dupe file handle");
+        }
     }
 
     if (close_file)