The SPU compiler does not work properly with precompiled headers.

$ cat pch.h
#include <spu_intrinsics.h>

$ cat test.cpp
vec_float4 add(vec_float4 a, vec_float4 b)
{
	return spu_add(a, b);
}

$ /opt/cell/toolchain/bin/spu-g++ -O3 pch.h -o pch.h.gch

$ /opt/cell/toolchain/bin/spu-g++ -O3 -include pch.h -S test.cpp
test.cpp: In function 'float __vector__ add(float __vector__, float __vector__)':
test.cpp:3: error: insufficient arguments to overloaded function spu_add
test.cpp:4: confused by earlier errors, bailing out


However, if I delete pch.h.gch:

$ rm -f pch.h.gch
$ /opt/cell/toolchain/bin/spu-g++ -O3 -include pch.h -S test.cpp

it compiles as expected.

This behaviour is observed in:

$ /opt/cell/toolchain/bin/spu-g++ -v
Using built-in specs.
Target: spu
Configured with: ../configure --prefix=/opt/cell/toolchain --disable-shared --disable-nls --disable-threads --disable-checking --with-headers --enable-version-specific-runtime-libs --disable-libssp --enable-languages=c,c++ --with-system-zlib --with-newlib --program-prefix=spu- --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=spu : (reconfigured) ../configure --prefix=/opt/cell/toolchain --disable-shared --disable-nls --disable-threads --disable-checking --with-headers --enable-version-specific-runtime-libs --disable-libssp --enable-languages=c,c++ --with-system-zlib --with-newlib --program-prefix=spu- --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=spu
Thread model: single
gcc version 4.4.0 (GCC) 


as well as

$ spu-g++ -v
Using built-in specs.
Target: spu
Configured with: ../toolchain/gcc/configure --prefix=/usr/lib/cell/toolchain --libexecdir=/usr/lib/cell/toolchain/lib --mandir=/usr/lib/cell/toolchain/man --infodir=/usr/lib/cell/toolchain/info --with-sysroot=/usr/lib/cell/sysroot --disable-shared --disable-nls --disable-threads --disable-checking --with-headers --enable-version-specific-runtime-libs --disable-libssp --enable-languages=c,c++,fortran --with-system-zlib --with-newlib --program-prefix=spu- --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=spu
Thread model: single
gcc version 4.1.1

though the output is different with 4.1.1:

$ spu-g++ -O3 -include pch.h -S test.cpp
test.cpp: In function 'float __vector__ add(float __vector__, float __vector__)':
test.cpp:3: error: no matching function for call to 'spu_add(float __vector__&, float __vector__&)'
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:818: note: candidates are: unsigned int __vector__ spu_add(unsigned int __vector__, unsigned int __vector__)
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:823: note:                 int __vector__ spu_add(int __vector__, int __vector__)
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:828: note:                 short unsigned int __vector__ spu_add(short unsigned int __vector__, short unsigned int __vector__)
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:833: note:                 short int __vector__ spu_add(short int __vector__, short int __vector__)
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:838: note:                 float __vector__ spu_add(float __vector__, float __vector__)
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:843: note:                 double __vector__ spu_add(double __vector__, double __vector__)
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:848: note:                 short unsigned int __vector__ spu_add(short unsigned int __vector__, short unsigned int)
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:853: note:                 short int __vector__ spu_add(short int __vector__, short int)
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:858: note:                 unsigned int __vector__ spu_add(unsigned int __vector__, unsigned int)
/usr/lib/cell/toolchain/lib/gcc/spu/4.1.1/include/spu_internals.h:863: note:                 int __vector__ spu_add(int __vector__, int)
test.cpp:4: confused by earlier errors, bailing out