Perlbrew构建5.28.2失败，显然没有失败

Question

我是perl的新手，还不习惯构建开发工具。我尝试构建5.28.2，但失败了，出现以下错误：

Test Summary Report
-------------------
porting/libperl.t                                                (Wstat: 65280 Tests: 35 Failed: 0)
  Non-zero exit status: 255
  Parse errors: No plan found in TAP output
Files=2657, Tests=1169052, 1297 wallclock secs (88.11 usr 13.73 sys + 620.41 cusr 99.27 csys = 821.52 CPU)
Result: FAIL
make: *** [test_harness] Error 1
##### Brew Failed ##### 

问题报告为：

porting/libperl.t: Unexpected /usr/bin/nm error: no symbols
porting/libperl.t: Unexpected /usr/bin/nm errors
porting/libperl.t .................................................. 
Dubious, test returned 255 (wstat 65280, 0xff00)
All 35 subtests passed 

现在，在我未受过训练的眼睛看来，似乎没有任何失败。我很想在不使用notest或force的情况下运行构建，但是我不知道我得到的是什么。顺便说一句，我在这个版本中启用了线程。那么，这是我可以忽略的事情吗？非常感谢

注意:这是在装有OSX 10.15.4的Mac上。

Answer 1

以下是有关失败测试的更多信息：

$ cd /Users/hakonhaegland/perl5/perlbrew/build/perl-5.28.2/perl-5.28.2/t
$ ./perl -I../lib TEST porting/libperl.t
t/porting/libperl ... porting/libperl.t: Unexpected /usr/bin/nm error: no symbols
porting/libperl.t: Unexpected /usr/bin/nm errors
FAILED--no leader found
Failed 1 test out of 0, 0.00% okay.
    porting/libperl.t
### Since not all tests were successful, you may want to run some of
### them individually and examine any diagnostic messages they produce.
### See the INSTALL document's section on "make test".
### You may have to set your dynamic library search path,
### DYLD_LIBRARY_PATH, to point to the build directory:
###   setenv DYLD_LIBRARY_PATH `pwd`:$DYLD_LIBRARY_PATH; cd t; ./perl harness
###   DYLD_LIBRARY_PATH=`pwd`:$DYLD_LIBRARY_PATH; export DYLD_LIBRARY_PATH; cd t; ./perl harness
###   export DYLD_LIBRARY_PATH=`pwd`:$DYLD_LIBRARY_PATH; cd t; ./perl harness
### for csh-style shells, like tcsh; or for traditional/modern
### Bourne-style shells, like bash, ksh, and zsh, respectively.
Elapsed: 0 sec
u=0.01  s=0.01  cu=0.07  cs=0.03  scripts=0  tests=0

编辑

更多的调查表明，libperl.a上的nm输出向STDERR提供了意外的输出no symbols：

$ /usr/bin/nm -m ../libperl.a > /dev/null
no symbols

(很想知道为什么会发生这种情况)无论如何，您可以通过编辑t/porting/libperl.t中的第579行来修复测试

if (/nm: no name list/ && $^O eq 'darwin') {

至

if ((/nm: no name list/ || /^no symbols$/) && $^O eq 'darwin') {

然后重新运行测试：

$ ./perl -I../lib TEST porting/libperl.t
t/porting/libperl ... ok
All tests successful.
Elapsed: 0 sec
u=0.01  s=0.00  cu=0.09  cs=0.02  scripts=1  tests=35