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add configure-time warning on unsupported backtrace capturing

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Both libgcc and libc's backtrace() are not really options for stack
trace capturing from inside profiling signal handler. So lets warn
people.
This commit is contained in:
Aliaksey Kandratsenka 2017-05-21 23:28:48 -07:00
parent cef582350c
commit f7ff175b92
1 changed files with 2 additions and 2 deletions
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4
configure.ac
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@ -634,7 +634,7 @@ AC_OUTPUT
AS_IF([test "$x86_no_fp_by_default" = yes && test "x$enable_frame_pointers" != xyes && test "x$UNWIND_LIBS" = x && test "x$enable_minimal" != xyes],
[AS_IF([test "x$perftools_cv_have_unwind_backtrace" = xyes],
[AC_MSG_WARN([No frame pointers and no libunwind. Using experimental backtrace capturing via libgcc])],
[AC_MSG_WARN([No frame pointers and no libunwind. Using experimental backtrace capturing via libgcc. Expect crashy cpu profiler.])],
[AS_IF([test "x$enable_backtrace" = xyes],
[AC_MSG_WARN([No frame pointers and no libunwind. Using experimental backtrace()])],
[AC_MSG_WARN([No frame pointers and no libunwind. Using experimental backtrace(). Expect crashy cpu profiler.])],
[AC_MSG_FAILURE([No frame pointers and no libunwind. The compilation will fail])])])])