blob: e2d452f966e26fc73e615e40be6873b546af78fa (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
https://bugs.gentoo.org/938689
mbuffer use macro LIBC_(OPEN|READ|WRITE|FSTAT) whic are determined by
'objdump -T ... | awk ...', but in the case of clag (at least for now),
depend on the optimization levels, open|read will be optimized to other
methods which cause LIBC_(OPEN|READ) become "", then error bellow:
expected identifier or '('
55 | int LIBC_OPEN(const char *path, int oflag, ...)
I don't know the reason to find the name of open|read|write|fstat by this
test, so use -O0 for the feature test code.
Upstream Replied:
> this concept is needed for the tapedrive emulator that replicates the
> behavior of specific devices.
diff --git a/configure.in b/configure.in
index 95d6772..081625a 100644
--- a/configure.in
+++ b/configure.in
@@ -155,6 +155,8 @@ AC_LANG(C)
if test -z "$OBJDUMP"; then
AC_MSG_WARN([unable to find objdump, which is needed to run tests])
else
+ old_CFLAGS="${CFLAGS}"
+ CFLAGS="-O0"
AC_MSG_CHECKING([linking open() and write() to detect libc names])
AC_LINK_IFELSE([
AC_LANG_SOURCE([[
@@ -191,6 +193,7 @@ else
],
[AC_MSG_FAILURE([failed to link open/write test])]
)
+ CFLAGS="${old_CFLAGS}"
fi
|
