Bug 16293 – WebKit fails to build on Linux/PPC with gcc 4.2.2

• Component: JavaScriptCore
• Status: RESOLVED DUPLICATE

[Patryk Zawadzki]

ppc-pld-linux-g++ -c -pipe -D_REENTRANT -D_REENTRANT -I/usr/include -O2 -fno-strict-aliasing -fwrapv -fsigned-char -fno-strict-aliasing -gdwarf-2 -g2 -Wall -W -DBUILDING_GTK__ -I/usr/share/qt4/mkspecs/linux-g++ -I../../../../JavaScriptCore/kjs -I../../../../JavaScriptCore -I../../../../JavaScriptCore/kjs -I../../../../JavaScriptCore/bindings -I../../../../JavaScriptCore/bindings/c -I../../../../JavaScriptCore/wtf -Itmp -I../../../../JavaScriptCore -I../../../../JavaScriptCore/kjs -I../../../../JavaScriptCore/bindings -I../../../../JavaScriptCore/bindings/c -I../../../../JavaScriptCore/wtf -I../../../../JavaScriptCore/pcre -Itmp -I../../../../JavaScriptCore/kjs -I. -o tmp/TCSystemAlloc.o ../../../../JavaScriptCore/wtf/TCSystemAlloc.cpp
../../../../JavaScriptCore/wtf/TCSpinLock.h: In function 'void* TCMalloc_SystemAlloc(size_t, size_t*, size_t)':
../../../../JavaScriptCore/wtf/TCSpinLock.h:107: error: 'asm' operand requires impossible reload

[Patryk Zawadzki]

Forgot to mention, this is r28383

[Mark Rowe (bdash)]

*** This bug has been marked as a duplicate of 14521 ***

[Patryk Zawadzki]

This shouldn't be marked as duplicate as it seems to be a regression. r27953 completed a full build while r26865 did not. Now it's failing again with r28383.

[David Kilzer (:ddkilzer)]

(In reply to comment #3)
> This shouldn't be marked as duplicate as it seems to be a regression. r27953
> completed a full build while r26865 did not. Now it's failing again with
> r28383.

Sounds like gcc is generating different code based on other changes in JavaScriptCore.  (Care to do a binary search of svn revisions to find the cause?)  Does the same fix in Bug 14521 work for r28383?

[Patryk Zawadzki]

For your information, r28565 built fine just a minute ago. I don't have enough computing power to do a full bisect and find the offending changes though.