[mercury-users] Problems building Mercury 0.13.0 on Mac OS X 10.4.7 Tiger

[Markus Morawitz]

Hello,

I have compiled the new Mercury release 0.13.0 on a G4 running Mac OS  
X 10.4.7 Tiger.

Although using gcc version 3.3 as recommended (gcc 4.0 indeed do not  
work at all) I have run into problems. Luckily I was able to find a  
workaround changing two files after running configure and the build  
of Mercury succeeded.

In the following I will shortly describe all the necessary steps to  
compile and install Mercury on Mac OS X including the problem I have  
encountered.

Step 1:
Run the configuration script as follows:
./configure --with-cc=/usr/bin/gcc-3.3

Step 2:
The problem occurs by linking against libgcc.a.
The configuration mechanism uses the command `/usr/bin/gcc-3.3 -print- 
libgcc-file-name` to link against the library. But unfortunately this  
command only results in the string "libgcc.a" and not the full path  
of the library (which gcc-4.0 does!). The linker cannot find libgcc.a  
and fails.

The correct argument for the linker must either be
-lgcc
or using the full path of libgcc.a which should be
/usr/lib/darwin/libgcc.a

Step 3:
The workaround is to exchange every occurance of `/usr/bin/gcc-3.3 - 
print-libgcc-file-name` by -lgcc so the linker can link against the  
library.

The two files "scripts/ml" and "Mmake.common" are affected.
scripts/ml :

#SHARED_LIBS=${MERCURY_SHARED_LIBS="`/usr/bin/gcc-3.3 -print-libgcc- 
file-name` $MATH_LIB -lc"}
SHARED_LIBS=${MERCURY_SHARED_LIBS="-lgcc $MATH_LIB -lc"}


Mmake.common :
#SHARED_LIBS = `/usr/bin/gcc-3.3 -print-libgcc-file-name` $(MATH_LIB)  
-lc
SHARED_LIBS = -lgcc $(MATH_LIB) -lc

Step 4:
Running "make" and "make install" after those two changes will  
succeed in building Mercury.

Perhaps the configuration process can be investigated and changed  
somehow to cope with the strange behaviour of the argument "-print- 
libgcc-file-name" for gcc on Mac OS X.

Thank you and best regards

Markus Morawitz
markusmorawitz at gmx.de


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