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26 lines
943 B
Diff
26 lines
943 B
Diff
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--- a/libs/l4/include/types.h 2008-06-16 07:16:55.000000000 +0200
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+++ b/libs/l4/include/types.h 2010-11-24 12:48:52.000000000 +0200
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@@ -180,9 +180,19 @@
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#endif
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/** @todo FIXME Source from libc's limit.h once we can - awiggins. */
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-#define CHAR_BIT 8
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-#define WORD_T_BIT (sizeof (word_t) * CHAR_BIT)
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-#define L4_BITS_PER_WORD WORD_T_BIT
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+#ifndef CHAR_BIT
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+/*
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+ * Do not use a #define for 'CHAR_BIT' because such a definition
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+ * would ultimately collide with libc headers (see the predictive
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+ * comment above). If OKL4 headers are included into a dedicated
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+ * C++ namespace, this conflict can be avoided. OKL4's CHAR_BIT
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+ * will then end up being 'Okl4::CHAR_BIT' wheras libc's CHAR_BIT
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+ * will populate the root name space.
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+ */
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+enum { CHAR_BIT = 8 };
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+#endif
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+enum { WORD_T_BIT = sizeof(word_t) * CHAR_BIT };
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+enum { L4_BITS_PER_WORD = WORD_T_BIT };
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// XXX: magpie workaround
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// # define __PLUS32 + (sizeof (L4_Word_t) * 8 - 32)
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