path: root/mcon/U/d_uctx_mctx.U
diff options
Diffstat (limited to 'mcon/U/d_uctx_mctx.U')
1 files changed, 44 insertions, 0 deletions
diff --git a/mcon/U/d_uctx_mctx.U b/mcon/U/d_uctx_mctx.U
new file mode 100644
index 0000000..3e60723
--- /dev/null
+++ b/mcon/U/d_uctx_mctx.U
@@ -0,0 +1,44 @@
+?RCS: Copyright (c) 2012 Raphael Manfredi
+?RCS: You may redistribute only under the terms of the Artistic License,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic License; a copy of which may be found at the root
+?RCS: of the source tree for dist 4.0.
+?MAKE:d_uctx_mctx: Trylink cat i_ucontext i_sys_ucontext
+?MAKE: -pick add $@ %<
+?S: This variable conditionally defines the HAS_UCONTEXT_MCONTEXT symbol,
+?S: which indicates to the C program that it can access general registers
+?S: through some field in ucontext->uc_mcontext.
+?C: This symbol, if defined, indicates that the C program can access the
+?C: processor's general registers through some field in the uc_mcontext
+?C: machine context field from the ucontext_t structure.
+?H:#$d_uctx_mctx HAS_UCONTEXT_MCONTEXT /**/
+?LINT:set d_uctx_mctx
+: check for machine context field in the ucontext structure
+$cat >try.c <<EOC
+#$i_ucontext I_UCONTEXT
+#$i_sys_ucontext I_SYS_UCONTEXT
+#ifdef I_UCONTEXT
+#include <ucontext.h>
+#include <sys/ucontext.h>
+int main(void)
+ static ucontext_t *uc = 0;
+ return (int) &uc->uc_mcontext;
+cyn="whether 'struct ucontext' has a 'uc_mcontext' member"
+set d_uctx_mctx
+eval $trylink