[PATCH] don't shadow functions with macros in C++

[Bobby Bingham <koorogi@koorogi.info>]

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C++ programmers typically expect something like "::function(x,y)" to work
and may be surprised to find that "(::function)(x,y)" is actually required
due to the headers declaring a macro version of some standard functions.

We already omit function-like macros for C++ in most cases where there is
a real function available. This commit extends this to the remaining
function-like macros which have a real function version.
---
 include/complex.h | 2 ++
 include/pthread.h | 2 ++
 include/threads.h | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/include/complex.h b/include/complex.h
index 13a45c5..e1af0d5 100644
--- a/include/complex.h
+++ b/include/complex.h
@@ -101,6 +101,7 @@ double creal(double complex);
 float crealf(float complex);
 long double creall(long double complex);

+#ifndef __cplusplus
 #define __CIMAG(x, t) \
 	((union { _Complex t __z; t __xy[2]; }){(_Complex t)(x)}.__xy[1])

@@ -111,6 +112,7 @@ long double creall(long double complex);
 #define cimag(x) __CIMAG(x, double)
 #define cimagf(x) __CIMAG(x, float)
 #define cimagl(x) __CIMAG(x, long double)
+#endif

 #define __CMPLX(x, y, t) \
 	((union { _Complex t __z; t __xy[2]; }){.__xy = {(x),(y)}}.__z)
diff --git a/include/pthread.h b/include/pthread.h
index f7c9568..2697e8b 100644
--- a/include/pthread.h
+++ b/include/pthread.h
@@ -84,7 +84,9 @@ __attribute__((const))
 pthread_t pthread_self(void);

 int pthread_equal(pthread_t, pthread_t);
+#ifndef __cplusplus
 #define pthread_equal(x,y) ((x)==(y))
+#endif

 int pthread_setcancelstate(int, int *);
 int pthread_setcanceltype(int, int *);
diff --git a/include/threads.h b/include/threads.h
index 0e5836c..0179482 100644
--- a/include/threads.h
+++ b/include/threads.h
@@ -51,7 +51,9 @@ void thrd_yield(void);

 thrd_t thrd_current(void);
 int thrd_equal(thrd_t, thrd_t);
+#ifndef __cplusplus
 #define thrd_equal(A, B) ((A) == (B))
+#endif

 void call_once(once_flag *, void (*)(void));

--
Bobby Bingham

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