Can't seem to get a musl-libc build working

[svvac]

I'm trying to get a musl-libc build of phantomjs working, specifically for use in Alpine Linux without the glibc-compat stuff.

I'm building from source (git tag 2.1.1) with the following patches applied:

• qtwebkit/10
• qtbase/4

The build process doesn't seem to run through any trouble, except for a few warnings on unused variables AFAICT (the build log is ginormous however, can't say I went through it all). However, when launching the binary, I get the REPL, but it doesn't seem to execute anything:

$ phantomjs --debug=true
2016-06-14T09:54:46 [DEBUG] CookieJar - Created but will not store cookies (use option '--cookies-file=<filename>' to enable persistent cookie storage)
2016-06-14T09:54:46 [DEBUG] Set  "http"  proxy to:  "" : 1080
2016-06-14T09:54:46 [DEBUG] Phantom - execute: Configuration
2016-06-14T09:54:46 [DEBUG]      0 objectName : ""
2016-06-14T09:54:46 [DEBUG]      1 cookiesFile : ""
2016-06-14T09:54:46 [DEBUG]      2 diskCacheEnabled : "false"
2016-06-14T09:54:46 [DEBUG]      3 maxDiskCacheSize : "-1"
2016-06-14T09:54:46 [DEBUG]      4 diskCachePath : ""
2016-06-14T09:54:46 [DEBUG]      5 ignoreSslErrors : "false"
2016-06-14T09:54:46 [DEBUG]      6 localUrlAccessEnabled : "true"
2016-06-14T09:54:46 [DEBUG]      7 localToRemoteUrlAccessEnabled : "false"
2016-06-14T09:54:46 [DEBUG]      8 outputEncoding : "UTF-8"
2016-06-14T09:54:46 [DEBUG]      9 proxyType : "http"
2016-06-14T09:54:46 [DEBUG]      10 proxy : ":1080"
2016-06-14T09:54:46 [DEBUG]      11 proxyAuth : ":"
2016-06-14T09:54:46 [DEBUG]      12 scriptEncoding : "UTF-8"
2016-06-14T09:54:46 [DEBUG]      13 webSecurityEnabled : "true"
2016-06-14T09:54:46 [DEBUG]      14 offlineStoragePath : ""
2016-06-14T09:54:46 [DEBUG]      15 localStoragePath : ""
2016-06-14T09:54:46 [DEBUG]      16 localStorageDefaultQuota : "-1"
2016-06-14T09:54:46 [DEBUG]      17 offlineStorageDefaultQuota : "-1"
2016-06-14T09:54:46 [DEBUG]      18 printDebugMessages : "true"
2016-06-14T09:54:46 [DEBUG]      19 javascriptCanOpenWindows : "true"
2016-06-14T09:54:46 [DEBUG]      20 javascriptCanCloseWindows : "true"
2016-06-14T09:54:46 [DEBUG]      21 sslProtocol : "default"
2016-06-14T09:54:46 [DEBUG]      22 sslCiphers : "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-RC4-SHA:ECDHE-RSA-RC4-SHA:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:RC4-SHA:RC4-MD5"
2016-06-14T09:54:46 [DEBUG]      23 sslCertificatesPath : ""
2016-06-14T09:54:46 [DEBUG]      24 sslClientCertificateFile : ""
2016-06-14T09:54:46 [DEBUG]      25 sslClientKeyFile : ""
2016-06-14T09:54:46 [DEBUG]      26 sslClientKeyPassphrase : ""
2016-06-14T09:54:46 [DEBUG]      27 webdriver : ":"
2016-06-14T09:54:46 [DEBUG]      28 webdriverLogFile : ""
2016-06-14T09:54:46 [DEBUG]      29 webdriverLogLevel : "INFO"
2016-06-14T09:54:46 [DEBUG]      30 webdriverSeleniumGridHub : ""
2016-06-14T09:54:46 [DEBUG] Phantom - execute: Script & Arguments
2016-06-14T09:54:46 [DEBUG]      script: ""
2016-06-14T09:54:46 [DEBUG] Phantom - execute: Starting REPL mode
2016-06-14T09:54:46 [DEBUG] WebPage - setupFrame ""
phantomjs> var a = 10
phantomjs> console.log(a);
phantomjs> console.log('Echo?')
phantomjs> This is not even *valid syntax*, yet it doesn't complain /o\
phantomjs> ^C
2016-06-14T09:55:52 [DEBUG] WebPage - setupFrame ""
2016-06-14T09:55:52 [DEBUG] WebPage - updateLoadingProgress: 10
2016-06-14T09:55:52 [DEBUG] WebPage - setupFrame ""
2016-06-14T09:55:52 [DEBUG] WebPage - updateLoadingProgress: 100

If anything is missing, I'd be happy to give more details.

Additional info:

$ phantomjs -v
2.1.1

$ ldd /usr/bin/phantomjs 
    /lib/ld-musl-x86_64.so.1 (0x559e6abbb000)
    libz.so.1 => /lib/libz.so.1 (0x7f1a3da7a000)
    libsqlite3.so.0 => /usr/lib/libsqlite3.so.0 (0x7f1a3d7cf000)
    libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x7f1a3d598000)
    libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x7f1a3d2ea000)
    libssl.so.1.0.0 => /lib/libssl.so.1.0.0 (0x7f1a3d081000)
    libcrypto.so.1.0.0 => /lib/libcrypto.so.1.0.0 (0x7f1a3cc64000)
    libicui18n.so.56 => /usr/lib/libicui18n.so.56 (0x7f1a3c839000)
    libicuuc.so.56 => /usr/lib/libicuuc.so.56 (0x7f1a3c4cd000)
    libicudata.so.56 => /usr/lib/libicudata.so.56 (0x7f1a3aaea000)
    libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x7f1a3a79a000)
    libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x7f1a3a587000)
    libc.musl-x86_64.so.1 => /lib/ld-musl-x86_64.so.1 (0x559e6abbb000)
    libexpat.so.1 => /usr/lib/libexpat.so.1 (0x7f1a3a367000)
    libpng16.so.16 => /usr/lib/libpng16.so.16 (0x7f1a3a13a000)

$ paxctl -v /usr/bin/phantomjs 
PaX control v0.9
Copyright 2004,2005,2006,2007,2009,2010,2011,2012,2014 PaX Team <[email protected]>

- PaX flags: -----m-x-e-- [/usr/bin/phantomjs]
    MPROTECT is disabled
    RANDEXEC is disabled
    EMUTRAMP is disabled

[svvac]

Duplicate of #14186
Will post my stuff there, sorry for the noise.