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* [newlib-cygwin] Cygwin: don't export _feinitialise from newlib
@ 2021-04-13 10:56 Corinna Vinschen
0 siblings, 0 replies; only message in thread
From: Corinna Vinschen @ 2021-04-13 10:56 UTC (permalink / raw)
To: cygwin-cvs, newlib-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=cc19109af966331f76cc8b6fd7c92eec36dc2276
commit cc19109af966331f76cc8b6fd7c92eec36dc2276
Author: Corinna Vinschen <corinna@vinschen.de>
Date: Wed Mar 24 11:06:58 2021 +0100
Cygwin: don't export _feinitialise from newlib
Use the more official fesetenv(FE_DFL_ENV) from _dll_crt0, thus
allowing to drop the _feinitialise declaration from fenv.h.
Provide a no-op _feinitialise in Cygwin as exportable symbol for really
old applications when _feinitialise was called from mainCRTStartup in
crt0.o.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Diff:
---
newlib/libc/machine/shared_x86/sys/fenv.h | 5 -----
newlib/libm/machine/shared_x86/fenv.c | 7 +------
winsup/cygwin/Makefile.in | 1 +
winsup/cygwin/dcrt0.cc | 2 +-
winsup/cygwin/fenv.c | 5 +++++
5 files changed, 8 insertions(+), 12 deletions(-)
diff --git a/newlib/libc/machine/shared_x86/sys/fenv.h b/newlib/libc/machine/shared_x86/sys/fenv.h
index e0408fe5b..243cac27a 100644
--- a/newlib/libc/machine/shared_x86/sys/fenv.h
+++ b/newlib/libc/machine/shared_x86/sys/fenv.h
@@ -170,11 +170,6 @@ int fegetprec (void);
int fesetprec (int __prec);
#endif
-#ifdef __INSIDE_CYGWIN__
-/* Cygwin-internal ONLY. */
-extern void _feinitialise ();
-#endif
-
#endif /* __CYGWIN__ */
#ifdef __cplusplus
diff --git a/newlib/libm/machine/shared_x86/fenv.c b/newlib/libm/machine/shared_x86/fenv.c
index 8d1f1ad7f..ccc08e2d8 100644
--- a/newlib/libm/machine/shared_x86/fenv.c
+++ b/newlib/libm/machine/shared_x86/fenv.c
@@ -63,10 +63,8 @@ static inline bool use_sse(void)
return false;
}
-#ifndef __CYGWIN__
/* forward declaration */
static void _feinitialise (void);
-#endif
/* This function enables traps for each of the exceptions as indicated
by the parameter except. The individual exceptions are described in
@@ -451,10 +449,7 @@ fesetprec (int prec)
#endif
/* Set up the FPU and SSE environment at the start of execution. */
-#ifndef __CYGWIN__
-static
-#endif
-void
+static void
_feinitialise (void)
{
extern fenv_t __fe_dfl_env;
diff --git a/winsup/cygwin/Makefile.in b/winsup/cygwin/Makefile.in
index ff6798867..73d9b37fd 100644
--- a/winsup/cygwin/Makefile.in
+++ b/winsup/cygwin/Makefile.in
@@ -288,6 +288,7 @@ DLL_OFILES:= \
exec.o \
external.o \
fcntl.o \
+ fenv.o \
fhandler.o \
fhandler_clipboard.o \
fhandler_console.o \
diff --git a/winsup/cygwin/dcrt0.cc b/winsup/cygwin/dcrt0.cc
index 810017956..d4a08d18b 100644
--- a/winsup/cygwin/dcrt0.cc
+++ b/winsup/cygwin/dcrt0.cc
@@ -1085,7 +1085,7 @@ _dll_crt0 ()
fork_info->alloc_stack ();
#endif
- _feinitialise ();
+ fesetenv (FE_DFL_ENV);
_main_tls = &_my_tls;
_main_tls->call ((DWORD (*) (void *, void *)) dll_crt0_1, NULL);
}
diff --git a/winsup/cygwin/fenv.c b/winsup/cygwin/fenv.c
new file mode 100644
index 000000000..80f7cc52c
--- /dev/null
+++ b/winsup/cygwin/fenv.c
@@ -0,0 +1,5 @@
+/* no-op function as entry point for applications built between
+ 2010-09-11 and 2011-03-16. That's the timeframe of _feinitialise
+ being called from mainCRTStartup in crt0.o. */
+void _feinitialise (void)
+{}
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