With a lot of blood, sweat and tears I have managed to compile QScintilla2 (https://www.riverbankcomputing.com/software/qscintilla/download) for usage in the Anaconda Python Distribution (2.5.0; Python 2.7.11; PyQt4) on Mac OS X El Capitan.
After compilation and installation of everything inside the Qt4Qt5 and Python folders without errors or warnings, all appears to have ended up in the correct place in Anaconda.
However, when I try to import qscintilla2 with
import PyQt4.Qsci
I get the following error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: dlopen(/Users/daniel/anaconda/lib/python2.7/site-packages/PyQt4/Qsci.so, 2): Library not loaded: @rpath/./libQtGui.4.dylib
Referenced from: /Users/daniel/anaconda/lib/python2.7/site-packages/PyQt4/Qsci.so
Reason: image not found
Thus the module does not seem to be able to find libQtGui.4.dylib
I have done some reading up on the @rpath variable on the excellent blog https://mikeash.com/pyblog/friday-qa-2009-11-06-linking-and-install-names.html and ended up with knowing I have to use otool and install_name_tool in my attempts to solve this problem.
If I run otool -L I get the following output:
Qsci.so:
libQsci.dylib (compatibility version 0.0.0, current version 0.0.0)
/Users/daniel/anaconda/lib/libqscintilla2.11.dylib (compatibility version 11.3.0, current version 11.3.0)
@rpath/./libQtGui.4.dylib (compatibility version 4.8.0, current version 4.8.7)
@rpath/./libQtCore.4.dylib (compatibility version 4.8.0, current version 4.8.7)
/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 104.1.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1)
and otool -l gives me
Qsci.so:
Load command 0
cmd LC_SEGMENT_64
cmdsize 632
segname __TEXT
vmaddr 0x0000000000000000
vmsize 0x000000000009b000
fileoff 0
filesize 634880
maxprot 0x00000007
initprot 0x00000005
nsects 7
flags 0x0
Section
sectname __text
segname __TEXT
addr 0x0000000000002450
size 0x000000000006bcf6
offset 9296
align 2^4 (16)
reloff 0
nreloc 0
flags 0x80000400
reserved1 0
reserved2 0
Section
sectname __stubs
segname __TEXT
addr 0x000000000006e146
size 0x0000000000001956
offset 450886
align 2^1 (2)
reloff 0
nreloc 0
flags 0x80000408
reserved1 0 (index into indirect symbol table)
reserved2 6 (size of stubs)
Section
sectname __stub_helper
segname __TEXT
addr 0x000000000006fa9c
size 0x00000000000032ac
offset 457372
align 2^2 (4)
reloff 0
nreloc 0
flags 0x80000400
reserved1 0
reserved2 0
Section
sectname __const
segname __TEXT
addr 0x0000000000072d50
size 0x0000000000008e47
offset 470352
align 2^4 (16)
reloff 0
nreloc 0
flags 0x00000000
reserved1 0
reserved2 0
Section
sectname __cstring
segname __TEXT
addr 0x000000000007bb97
size 0x0000000000000f62
offset 506775
align 2^0 (1)
reloff 0
nreloc 0
flags 0x00000002
reserved1 0
reserved2 0
Section
sectname __unwind_info
segname __TEXT
addr 0x000000000007cafc
size 0x00000000000014b4
offset 510716
align 2^2 (4)
reloff 0
nreloc 0
flags 0x00000000
reserved1 0
reserved2 0
Section
sectname __eh_frame
segname __TEXT
addr 0x000000000007dfb0
size 0x000000000001d048
offset 516016
align 2^3 (8)
reloff 0
nreloc 0
flags 0x00000000
reserved1 0
reserved2 0
Load command 1
cmd LC_SEGMENT_64
cmdsize 632
segname __DATA
vmaddr 0x000000000009b000
vmsize 0x0000000000027000
fileoff 634880
filesize 159744
maxprot 0x00000007
initprot 0x00000003
nsects 7
flags 0x0
Section
sectname __dyld
segname __DATA
addr 0x000000000009b000
size 0x0000000000000010
offset 634880
align 2^3 (8)
reloff 0
nreloc 0
flags 0x00000000
reserved1 0
reserved2 0
Section
sectname __got
segname __DATA
addr 0x000000000009b010
size 0x0000000000000030
offset 634896
align 2^3 (8)
reloff 0
nreloc 0
flags 0x00000006
reserved1 1081 (index into indirect symbol table)
reserved2 0
Section
sectname __la_symbol_ptr
segname __DATA
addr 0x000000000009b040
size 0x00000000000021c8
offset 634944
align 2^3 (8)
reloff 0
nreloc 0
flags 0x00000007
reserved1 1087 (index into indirect symbol table)
reserved2 0
Section
sectname __const
segname __DATA
addr 0x000000000009d210
size 0x00000000000050f8
offset 643600
align 2^4 (16)
reloff 0
nreloc 0
flags 0x00000000
reserved1 0
reserved2 0
Section
sectname __data
segname __DATA
addr 0x00000000000a2310
size 0x000000000001f091
offset 664336
align 2^4 (16)
reloff 0
nreloc 0
flags 0x00000000
reserved1 0
reserved2 0
Section
sectname __bss
segname __DATA
addr 0x00000000000c13b0
size 0x0000000000000430
offset 0
align 2^4 (16)
reloff 0
nreloc 0
flags 0x00000001
reserved1 0
reserved2 0
Section
sectname __common
segname __DATA
addr 0x00000000000c17e0
size 0x0000000000000030
offset 0
align 2^3 (8)
reloff 0
nreloc 0
flags 0x00000001
reserved1 0
reserved2 0
Load command 2
cmd LC_SEGMENT_64
cmdsize 72
segname __LINKEDIT
vmaddr 0x00000000000c2000
vmsize 0x0000000000063000
fileoff 794624
filesize 402904
maxprot 0x00000007
initprot 0x00000001
nsects 0
flags 0x0
Load command 3
cmd LC_ID_DYLIB
cmdsize 40
name libQsci.dylib (offset 24)
time stamp 1 Thu Jan 1 01:00:01 1970
current version 0.0.0
compatibility version 0.0.0
Load command 4
cmd LC_SYMTAB
cmdsize 24
symoff 863408
nsyms 5494
stroff 964424
strsize 233104
Load command 5
cmd LC_DYSYMTAB
cmdsize 80
ilocalsym 0
nlocalsym 2227
iextdefsym 2227
nextdefsym 2034
iundefsym 4261
nundefsym 1233
tocoff 0
ntoc 0
modtaboff 0
nmodtab 0
extrefsymoff 0
nextrefsyms 0
indirectsymoff 955752
nindirectsyms 2168
extreloff 951312
nextrel 555
locreloff 794624
nlocrel 7955
Load command 6
cmd LC_UUID
cmdsize 24
uuid 888BE029-40E0-3D69-83D4-B236B57ADFD4
Load command 7
cmd LC_VERSION_MIN_MACOSX
cmdsize 16
version 10.5
sdk 10.11
Load command 8
cmd LC_LOAD_DYLIB
cmdsize 80
name /Users/daniel/anaconda/lib/libqscintilla2.11.dylib (offset 24)
time stamp 2 Thu Jan 1 01:00:02 1970
current version 11.3.0
compatibility version 11.3.0
Load command 9
cmd LC_LOAD_DYLIB
cmdsize 56
name @rpath/./libQtGui.4.dylib (offset 24)
time stamp 2 Thu Jan 1 01:00:02 1970
current version 4.8.7
compatibility version 4.8.0
Load command 10
cmd LC_LOAD_DYLIB
cmdsize 56
name @rpath/./libQtCore.4.dylib (offset 24)
time stamp 2 Thu Jan 1 01:00:02 1970
current version 4.8.7
compatibility version 4.8.0
Load command 11
cmd LC_LOAD_DYLIB
cmdsize 56
name /usr/lib/libstdc++.6.dylib (offset 24)
time stamp 2 Thu Jan 1 01:00:02 1970
current version 104.1.0
compatibility version 7.0.0
Load command 12
cmd LC_LOAD_DYLIB
cmdsize 56
name /usr/lib/libSystem.B.dylib (offset 24)
time stamp 2 Thu Jan 1 01:00:02 1970
current version 1226.10.1
compatibility version 1.0.0
Load command 13
cmd LC_FUNCTION_STARTS
cmdsize 16
dataoff 858264
datasize 5144
Load command 14
cmd LC_DATA_IN_CODE
cmdsize 16
dataoff 863408
datasize 0
As far as I can see it, there is no entry of @rpath present in this module (or at least I should have found an LC_RPATH command?). I can set this of course with install_name_tool afterwards, but that's where I get stuck.
I don't understand what in this situation is regarded as @loader_path and @executable_path for the Qsci.so module. It is located at
/Users/daniel/anaconda/lib/python2.7/site-packages/PyQt4/Qsci.so
but it seems to be a direct reference to
/Users/daniel/anaconda/lib/libqscintilla2.11.dylib
So would /Users/daniel/anaconda/lib/python2.7/site-packages/PyQt4/ or /Users/daniel/anaconda/lib/ be the @loader_path in this case? I assume that the @executable_path just points to the path of the Python interpreter which is in /Users/daniel/anaconda/bin, but correct me if I am wrong.
Both libQtGui.4.dylib and libQtCore.4.dylib are located at
/Users/daniel/anaconda/lib/
I tried to add what I think are the correct @rpaths manually with
install_name_tool -add_rpath @loader_path/../../ Qsci.so
install_name_tool -add_rpath @loader_path/../lib Qsci.so
the first entry assuming the containing folder of Qsci.so to be the @loader_path and the second one of libqscintilla2.11.dylib, but to no avail...
If I add the absolute path to @rpath with
install_name_tool -add_rpath /Users/daniel/anaconda/lib Qsci.so
it does solve the problem, so I do know this is an rpath issue. I do need the relative locations however as I plan to package the app once I get this right.
Thanks for any help with this, and my apologies that this post has become way longer than intended!
By inspecting other PyQt4 modules, I figured out I had to add an rpath entry with install_name_tool pointing to @loader_path/../../../ in Qsci.so. Below you'll find a bash script which goes through the whole installation process of QScintilla2 for Anaconda on a Mac.