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Kevan Hashemi | 14 Sep 2011 23:34
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Missing crt1

Hi,

I recently moved from MacOS 10.4 to 10.5 on my old PPC laptop. I 
re-installed GPC for MacOS 10.5 from the Microbizz site. When I try to 
compile a hello world program, I get the following error:

gpc p.pas
/Xcode2.5/usr/bin/ld: can't locate file for: -lcrt1.o
collect2: ld returned 1 exit status

The file crt1.o is sitting in

/Xcode2.5/SDKs/MacOSX10.4u.sdk/usr/lib

When I add the above directory to my PATH, I still have problems. My 
path is now:

/usr/bin:/bin:/usr/sbin:/sbin:/Xcode2.5/usr/bin:/Xcode2.5/SDKs/MacOSX10.4u.sdk/usr/lib

Do I have my path set up wrong?

Yours, Kevan

--

-- 
Kevan Hashemi, Electrical Engineer
Physics Department, Brandeis University
http://alignment.hep.brandeis.edu/

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Adriaan van Os | 15 Sep 2011 07:52
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Re: Missing crt1

Kevan Hashemi wrote:
> Hi,
> 
> I recently moved from MacOS 10.4 to 10.5 on my old PPC laptop. I 
> re-installed GPC for MacOS 10.5 from the Microbizz site. When I try to 
> compile a hello world program, I get the following error:
> 
> gpc p.pas
> /Xcode2.5/usr/bin/ld: can't locate file for: -lcrt1.o
> collect2: ld returned 1 exit status
> 
> The file crt1.o is sitting in
> 
> /Xcode2.5/SDKs/MacOSX10.4u.sdk/usr/lib
> 
> When I add the above directory to my PATH, I still have problems. My 
> path is now:
> 
> /usr/bin:/bin:/usr/sbin:/sbin:/Xcode2.5/usr/bin:/Xcode2.5/SDKs/MacOSX10.4u.sdk/usr/lib 
> 
> 
> Do I have my path set up wrong?

The PATH environment variable is not what the linker is using. Apart from linking in crt1.0 
manulally, there are two solutions to your problem:

1. Check UNIX Tools in the Xcode installer when installing Xcode. This is the simplest solution.

2. Add the command line option -Wl,-syslibroot,/Xcode2.5/SDKs/MacOSX10.4u.sdk.
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Kevan Hashemi | 15 Sep 2011 14:19
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Re: Missing crt1

Dear Adriaan,

Thank you for your help.

> The PATH environment variable is not what the linker is using.

Of course you are right. I was not thinking clearly.

> Apart 
> from linking in crt1.0 manulally

This does not work because there are other libraries missing in addition.

> 1. Check UNIX Tools in the Xcode installer when installing Xcode. This 
> is the simplest solution.

I un-installed Xcode2.5 and re-installed, but did not see any UNIX Tools 
box.

> 2. Add the command line option 
> -Wl,-syslibroot,/Xcode2.5/SDKs/MacOSX10.4u.sdk.

This works. And it's the same line I add to make shared libraries out of 
my Pascal code. Thank you very much.

Last night I tried to solve my problem by running cctools-576 from your 
website. After that, my linker does not recognise the 
-mmacosx-version-min=10.4 option, despite removing and re-installing 
XCode 2.5. Where does this cctools come from? I Googled it, but am 
finding unrelated tools of the same name.
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Jonas Maebe | 15 Sep 2011 14:59
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Re: Missing crt1


On 15 Sep 2011, at 14:19, Kevan Hashemi wrote:

> I un-installed Xcode2.5 and re-installed, but did not see any UNIX  
> Tools box.

You may have to perform a custom install (click on the "Customize"  
button in the installer). There is no need to uninstall Xcode 2.5 first.

Jonas

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Kevan Hashemi | 15 Sep 2011 16:18
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Re: Missing crt1

Dear Jonas,

> You may have to perform a custom install (click on the "Customize" 
> button in the installer). There is no need to uninstall Xcode 2.5 first.

Thank you for yor suggestion. I tried that, and the installer is unaware 
of the fact that I already deleted the entire Xcode directory. It still 
thinks I have all the files installed, and it gives me no options for 
installing the files. I think I generally messed things up with a 
combination of deleting that Xcode directory and running cctools, and 
now I have to figure out how to get it sorted out again, short of 
re-installing my operating system.

Yours, Kevan

--

-- 
Kevan Hashemi, Electrical Engineer
Physics Department, Brandeis University
http://alignment.hep.brandeis.edu/

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Kevan Hashemi | 15 Sep 2011 17:34
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Re: Missing crt1

Dear GPC Users,

I think I have it all sorted now. It turns out that cctools installs 
eighteen files in /usr/bin. Among these are "ld" that takes precedence 
over the XCode2.5 "ld" if /usr/bin comes first in your directory search 
path.

Searching the likely directories on my hard drive with "ls -R | grep 
crt1.o" I find no crt1.o installed except in the Xcode2.5 directory 
tree. This leads me to conclude that cctools may install "ld" and "as" 
but they do not install the "crt1.o" library required by GPC to make an 
executable. So installing Xcode appears to be necessary on MacOSX10.5.

Of the eighteen files installed by cctools in /usr/bin, sixteen are 
available in /Xcode2.5/usr/bin/. Only "lipo" and "strings" are unique to 
/usr/bin. I deleted the uneccessary 16, leaving "lipo" and "strings". 
The pre-cctools version of these files are no longer available to me. 
But I built a universal binary with "lipo" and it seems to work.

After this removing the sixteen duplicate files from /usr/bin, my 
compile works fine with the library search directive that Adriaan suggested:

-Wl,-syslibroot,/Xcode2.5/SDKs/MacOSX10.4u.sdk/

and I can even add the convenient:

-mmacosx-version-min=10.4

which is the flag that the cctools "ld" would not accept.
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Jonas Maebe | 15 Sep 2011 17:42
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Re: Missing crt1


On 15 Sep 2011, at 17:34, Kevan Hashemi wrote:

> As to uninstalling XCode2.5, just deleting the XCode2.5 folder does not remove the devtools files in the
main UNIX file structure, so you have to run XCode2.5/Library/uninstall-devtools, which gets rid of
everything. After that, you can re-install XCode2.5. But it still gives me no UNIX Tools option.

I guess you are installing it on Mac OS X 10.5. There you can only globally install the Unix tools of Xcode 3.x.

Jonas
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Adriaan van Os | 15 Sep 2011 18:13
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Re: Missing crt1

Kevan Hashemi wrote:

> Last night I tried to solve my problem by running cctools-576 from your 
> website. After that, my linker does not recognise the 
> -mmacosx-version-min=10.4 option, despite removing and re-installing 
> XCode 2.5. Where does this cctools come from? I Googled it, but am 
> finding unrelated tools of the same name.

The cctools-576 are an older version of cctools, that work around a problem in Xcode/Projectbuilder 
1. My website says

	Unless you have installled Xcode 2.x or 3.x, you have to update Apple's Mac OS X assembler and 
linker (cctools-576). Click here to download sources (1.4 MB) and binaries (1.7 MB).

So, forget about them for Xcode 2, 3 or 4.

> In theory, can I run cctools-576 then run gpc, and so avoid installing XCode all-together? 

Although they install a linker and assembler, some extra files are needed to assemble and link with 
success. It is rather clumsy to have to install all of Xcode for just those few files, but I can't 
help it, that's Apple politics.

Regards,

Adriaan van Os

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