无法在macOS Catalina 10.15.1下安装DBD:：mysql。Mysql 8.0.18和openssl 1.0.2t是通过brew安装的。
以下是模块安装日志：
cpan[1]> install DBD::mysql
..........
I will use the following settings for compiling and testing:
cflags (mysql_config) = -I/usr/local/Cellar/mysql/8.0.18_1/include/mysql
embedded (guessed ) =
ldflags (guessed ) =
libs (mysql_config) = -L/usr/local/Cellar/mysql/8.0.18_1/lib -L/usr/local/opt/openssl/lib -lmysqlclient -lssl -lcrypto
mysql_config (guessed ) = mysql_config
nocatchstderr (default ) = 0
nofoundrows (default ) = 0
nossl (default ) = 0
testdb (default ) = test
testhost (default ) =
testpassword (default ) =
testport (default ) =
testsocket (default ) =
testuser (guessed ) = dmitry
To change these settings, see 'perl Makefile.PL --help' and
'perldoc DBD::mysql::INSTALL'.
Checking if libs are available for compiling...
Looks good.
Checking if your kit is complete...
Looks good
Using DBI 1.631 (for perl 5.018004 on darwin-thread-multi-2level) installed in /System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/auto/DBI/
Writing Makefile for DBD::mysql
Wide character in print at /System/Library/Perl/5.18/ExtUtils/MakeMaker.pm line 1034.
Wide character in print at /System/Library/Perl/5.18/ExtUtils/MakeMaker.pm line 1034.
Writing MYMETA.yml and MYMETA.json
cp lib/DBD/mysql/GetInfo.pm blib/lib/DBD/mysql/GetInfo.pm
cp lib/Bundle/DBD/mysql.pm blib/lib/Bundle/DBD/mysql.pm
cp lib/DBD/mysql/INSTALL.pod blib/lib/DBD/mysql/INSTALL.pod
cp lib/DBD/mysql.pm blib/lib/DBD/mysql.pm
cc -c -I/System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/auto/DBI -I/usr/local/Cellar/mysql/8.0.18_1/include/mysql -DDBD_MYSQL_WITH_SSL -g -g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -fstack-protector -Os -DVERSION="4.050" -DXS_VERSION="4.050" -iwithsysroot "/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE" dbdimp.c
In file included from dbdimp.c:15:
./dbdimp.h:20:10: fatal error: 'DBIXS.h' file not found
#include <DBIXS.h> /* installed by the DBI module */
^~~~~~~~~
1 error generated.
make: *** [dbdimp.o] Error 1
DVEEDEN/DBD-mysql-4.050.tar.gz
/usr/bin/make -- NOT OK
Running make test
Can't test without successful make
Running make install
Make had returned bad status, install seems impossible
Failed during this command:
DVEEDEN/DBD-mysql-4.050.tar.gz : make NO
cpan[2]>
编译器似乎找不到DBIXS.h文件。find在系统中找到了这个文件：
/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/auto/DBI/DBIXS.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/auto/DBI/DBIXS.h
/System/Volumes/Data/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/auto/DBI/DBIXS.h
/System/Volumes/Data/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/auto/DBI/DBIXS.h
/System/Volumes/Data/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/auto/DBI/DBIXS.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/auto/DBI/DBIXS.h
如何在编译过程中包含此头文件？
更新
我的搜索使我使用没有头文件的标准路径构建包
/System/Library/Perl/5.18/darwin-thread-multi-2level
并且您必须使用路径
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Perl/5.18/darwin-thread-multi-2level
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Perl/5.18/darwin-thread-multi-2level
但以下是如何具体说明？我在安装Mac:：SystemDirectory 时遇到了同样的问题
/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE/EXTERN.h-找不到文件
Perl信息：
perl -V
Summary of my perl5 (revision 5 version 18 subversion 4) configuration:
Platform:
osname=darwin, osvers=19.0, archname=darwin-thread-multi-2level
uname='darwin osx391.sd.apple.com 19.0 darwin kernel version 18.0.0: tue jul 9 11:12:08 pdt 2019; root:xnu-4903.201.2.100.7~1release_x86_64 x86_64 '
config_args='-ds -e -Dprefix=/usr -Dccflags=-g -pipe -Dldflags= -Dman3ext=3pm -Duseithreads -Duseshrplib -Dinc_version_list=none -Dcc=cc'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags =' -g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -fstack-protector',
optimize='-Os',
cppflags='-g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -fstack-protector'
ccversion='', gccversion='4.2.1 Compatible Apple LLVM 11.0.0 (clang-1100.0.32.4) (-macos10.15-objc-selector-opts)', gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -fstack-protector'
libpth=/usr/lib /usr/local/lib
libs=
perllibs=
libc=, so=dylib, useshrplib=true, libperl=libperl.dylib
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
cccdlflags=' ', lddlflags=' -bundle -undefined dynamic_lookup -fstack-protector'
Characteristics of this binary (from libperl):
Compile-time options: HAS_TIMES MULTIPLICITY PERLIO_LAYERS
PERL_DONT_CREATE_GVSV
PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP
PERL_PRESERVE_IVUV PERL_SAWAMPERSAND USE_64_BIT_ALL
USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES
USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE
USE_LOCALE_NUMERIC USE_PERLIO USE_PERL_ATOF
USE_REENTRANT_API
Locally applied patches:
/Library/Perl/Updates/<version> comes before system perl directories
installprivlib and installarchlib points to the Updates directory
Built under darwin
Compiled at Aug 23 2019 16:44:31
@INC:
/Library/Perl/5.18/darwin-thread-multi-2level
/Library/Perl/5.18
/Network/Library/Perl/5.18/darwin-thread-multi-2level
/Network/Library/Perl/5.18
/Library/Perl/Updates/5.18.4/darwin-thread-multi-2level
/Library/Perl/Updates/5.18.4
/System/Library/Perl/5.18/darwin-thread-multi-2level
/System/Library/Perl/5.18
/System/Library/Perl/Extras/5.18/darwin-thread-multi-2level
/System/Library/Perl/Extras/5.18
.
您在此处找到的丢失的EXTERN.h文件：
$ find /Library/Developer/CommandLineTools -name EXTERN.h
你可以在这里找到详细的说明：
DBD:：在Catalina/Bigh Sur上安装mysql失败，'；EXTERN.h'；找不到文件？