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| <a name="Standard-Header-File-Directories"></a> |
| <h2 class="chapter">21 Standard Header File Directories</h2> |
| |
| <p><code>GCC_INCLUDE_DIR</code> means the same thing for native and cross. It is |
| where GCC stores its private include files, and also where GCC |
| stores the fixed include files. A cross compiled GCC runs |
| <code>fixincludes</code> on the header files in <samp>$(tooldir)/include</samp>. |
| (If the cross compilation header files need to be fixed, they must be |
| installed before GCC is built. If the cross compilation header files |
| are already suitable for GCC, nothing special need be done). |
| </p> |
| <p><code>GPLUSPLUS_INCLUDE_DIR</code> means the same thing for native and cross. It |
| is where <code>g++</code> looks first for header files. The C++ library |
| installs only target independent header files in that directory. |
| </p> |
| <p><code>LOCAL_INCLUDE_DIR</code> is used only by native compilers. GCC |
| doesn’t install anything there. It is normally |
| <samp>/usr/local/include</samp>. This is where local additions to a packaged |
| system should place header files. |
| </p> |
| <p><code>CROSS_INCLUDE_DIR</code> is used only by cross compilers. GCC |
| doesn’t install anything there. |
| </p> |
| <p><code>TOOL_INCLUDE_DIR</code> is used for both native and cross compilers. It |
| is the place for other packages to install header files that GCC will |
| use. For a cross-compiler, this is the equivalent of |
| <samp>/usr/include</samp>. When you build a cross-compiler, |
| <code>fixincludes</code> processes any header files in this directory. |
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