Fatal error prevents XML::LibXML installation

[nickforino]

Hi everyone,

My attempts to install XML::LibXML with cpanm and also manually fail, and return the following fatal error:

cc -c  -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -fstack-protector -Os   -DVERSION=\"2.0206\" -DXS_VERSION=\"2.0206\"  -iwithsysroot "/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE"  -DHAVE_UTF8 Av_CharPtrPtr.c
cc -c  -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -fstack-protector -Os   -DVERSION=\"2.0206\" -DXS_VERSION=\"2.0206\"  -iwithsysroot "/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE"  -DHAVE_UTF8 Devel.c
Devel.xs:28:10: fatal error: 'libxml/xmlmemory.h' file not found
#include <libxml/xmlmemory.h>
         ^~~~~~~~~~~~~~~~~~~~
1 error generated.
make: *** [Devel.o] Error 1

After reading some similar issues I've ensured the dependent modules are properly installed (XML::SAX , XML:: NamespaceSupport) and that I've got a current version of libxml2 and Alien.

Any help would be greatly appreciated, please let me know any additional information you need to diagnose the issue and I'll respond promptly. Thanks!

[plicease]

Can you tell me what version of Alien::LibXML and Alien::Build you have installed, and if you can provide the log for its install?

[plicease]

Also make sure that you are running the tests when installing Alien::LibXML because it should fail if it detects the wrong flags.

[nickforino]

@plicease Thanks for your reply. Apparently I just had Alien, and not Alien::LibXML. Although I attempted to install Alien::LibXML via cpanm and this failed. I've attached the log, notably it throws the same error line when it fails:

 t/tree1.c:13:10: fatal error: 'libxml/parser.h' file not found
#include <libxml/parser.h>
         ^~~~~~~~~~~~~~~~~

build.log

[plicease]

@nickforino I apologize but the actual dependency is Alien::Libxml2 lol Can you try that one instead.

[nickforino]

@plicease no worries! My Alien::Libxml2 version is 0.17 and Alien::Build version is 2.37.

[nickforino]

@plicease I just tried to force reinstall Alien::Libxml2 and Alien::Build, I've attached the logs for both. The test and installation for Alien::Libxml2 failed, while Build installed without a hitch, I've attached the log for Libxml2.
build.log

[nickforino]

It appears that when attempting make, my system is having a hard time finding my libxml2 installation (hence the fatal errors). I tried setting the following environmental path variables, but this also failed.

export PATH = /usr/local/opt/libxml2/bin
export LDFLAGS="-L/usr/local/opt/libxml2/lib"
export CPPFLAGS="-I/usr/local/opt/libxml2/include"
export PKG_CONFIG_PATH="/usr/local/opt/libxml2/lib/pkgconfig"

[plicease]

Looks like Alien::Libxml2 is looking in /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include (from xml2-config) for the header files, can you check if the appropriate files in there?

One work around, if you don't mind Alien::Libxml2 building the library for you is to force a share install:

env ALIEN_INSTALL_TYPE=share cpanm -v Alien::Libxml2

[nickforino]

Hi @plicease, apologies for the very late reply.

Regarding your last question: I believe the path Alien::Libxml2 is looking for headers in/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include is incorrect. The header files (namely, I found parser.h) several directories deeper in /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/libxml2/libxml/parser.h.

[plicease]

Regarding your last question: I believe the path Alien::Libxml2 is looking for headers in/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include is incorrect. The header files (namely, I found parser.h) several directories deeper in /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/libxml2/libxml/parser.h.

The include path would have come from either xml2-config --cflags or pkg-config --cflags libxml-2.0 can you see if either of those has the wrong path specified?

[nickforino]

Indeed, looks like the wrong paths are specified!

xml2-config --cflags returns -I/usr/local/Cellar/libxml2/2.9.10_2/include/libxml2 I believe the Cellar directory is from Homebrew, but I can't quite remember what I tried to install, as I was likely trying things out of desperation...regardless, this path does not directly lead to the headers, which are again several directories further in /usr/local/Cellar/libxml2/2.9.10_2/include/libxml2/libxml.

Similarly, pkg-config --cflags libxml-2.0 returns the same path: -I/usr/local/Cellar/libxml2/2.9.10_2/include/libxml2

Is the solution to uninstall Homebrew?