For some platform, LLIntAssembly.h cannot be generated dynamically, but in Source\JavaScriptCore\GNUmakefile.am, a bunch of .lo files are dependent on LLIntAssembly.h with no condition. $(libjavascriptcoregtk_@WEBKITGTK_API_MAJOR_VERSION@_@WEBKITGTK_API_MINOR_VERSION@_la_OBJECTS): DerivedSources/JavaScriptCore/LLIntAssembly.h
If LLIntAssembly.h cannot be generated, there will be some log like: GEN DerivedSources/JavaScriptCore/LLIntAssembly.h offlineasm: Parsing ./Source/JavaScriptCore/llint/LowLevelInterpreter.asm and Programs/LLIntOffsetsExtractor and creating assembly file . offlineasm: No magic values found. assembly file generation.
Sorry, fix a typo in Comment#1. If LLIntAssembly.h cannot be generated, there will be some log like: GEN DerivedSources/JavaScriptCore/LLIntAssembly.h offlineasm: Parsing ./Source/JavaScriptCore/llint/LowLevelInterpreter.asm and Programs/LLIntOffsetsExtractor and creating assembly file . offlineasm: No magic values found. Skipping assembly file generation.
autotools build system of WebKitGTK was removed from trunk 4 months before - http://trac.webkit.org/changeset/166239 . So I think this bug is related to an older revision or release. On which revision/release do you get this fail? ( cc-ing GTK developers )
This problem is found on WebkitGTK 2.0.1
This error also occurs when compiling webkit-2.20.5 using cmake/ninja on an RPi3 (armv7): [32/1969] cd /mnt/sda8/usr/src/webkitgtk-2.20.5/build/DerivedSources/JavaScriptCore && /usr/local/bin/ruby /mnt/sda8/usr/src/webkitgtk-2.20.5/Source/JavaScriptCore/offlineasm/asm.rb -I/mnt/sda8/usr/src/webkitgtk-2.20.5/build/DerivedSources/JavaScriptCore/ /mnt/sda8/usr/src/webkitgtk-2.20.5/Source/JavaScriptCore/llint/LowLevelInterpreter.asm /mnt/sda8/usr/src/webkitgtk-2.20.5/build/bin/LLIntOffsetsExtractor /mnt/sda8/usr/src/webkitgtk-2.20.5/build/DerivedSources/JavaScriptCore/LLIntAssembly.h && /tmp/tcloop/cmake/usr/local/bin/cmake -E touch_nocreate /mnt/sda8/usr/src/webkitgtk-2.20.5/build/DerivedSources/JavaScriptCore/LLIntAssembly.h FAILED: DerivedSources/JavaScriptCore/LLIntAssembly.h cd /mnt/sda8/usr/src/webkitgtk-2.20.5/build/DerivedSources/JavaScriptCore && /usr/local/bin/ruby /mnt/sda8/usr/src/webkitgtk-2.20.5/Source/JavaScriptCore/offlineasm/asm.rb -I/mnt/sda8/usr/src/webkitgtk-2.20.5/build/DerivedSources/JavaScriptCore/ /mnt/sda8/usr/src/webkitgtk-2.20.5/Source/JavaScriptCore/llint/LowLevelInterpreter.asm /mnt/sda8/usr/src/webkitgtk-2.20.5/build/bin/LLIntOffsetsExtractor /mnt/sda8/usr/src/webkitgtk-2.20.5/build/DerivedSources/JavaScriptCore/LLIntAssembly.h && /tmp/tcloop/cmake/usr/local/bin/cmake -E touch_nocreate /mnt/sda8/usr/src/webkitgtk-2.20.5/build/DerivedSources/JavaScriptCore/LLIntAssembly.h offlineasm: No magic values found. Skipping assembly file generation.