| #!/bin/sh |
| # Script to test if gcc "-fwhole-program" works properly. |
| |
| mkdir -p out |
| TMPFILE1=out/tmp_testcompile1.c |
| TMPFILE1o=out/tmp_testcompile1.o |
| TMPFILE2=out/tmp_testcompile2.c |
| TMPFILE2o=out/tmp_testcompile2.o |
| TMPFILE3o=out/tmp_testcompile3.o |
| |
| # Test for "-fwhole-program". Older versions of gcc (pre v4.1) don't |
| # support the whole-program optimization - detect that. |
| $CC -fwhole-program -S -o /dev/null -xc /dev/null > /dev/null 2>&1 |
| if [ $? -ne 0 ]; then |
| echo " Working around no -fwhole-program" > /dev/fd/2 |
| echo 2 |
| exit 0 |
| fi |
| |
| # Test if "visible" variables and functions are marked global. On |
| # OpenSuse 10.3 "visible" variables declared with "extern" first |
| # aren't marked as global in the resulting assembler. On Ubuntu 7.10 |
| # "visible" functions aren't marked as global in the resulting |
| # assembler. |
| cat - > $TMPFILE1 <<EOF |
| void __attribute__((externally_visible)) t1() { } |
| extern unsigned char v1; |
| unsigned char v1 __attribute__((section(".data16.foo.19"))) __attribute__((externally_visible)); |
| EOF |
| $CC -Os -c -fwhole-program $TMPFILE1 -o $TMPFILE1o > /dev/null 2>&1 |
| cat - > $TMPFILE2 <<EOF |
| void t1(); |
| extern unsigned char v1; |
| int __attribute__((externally_visible)) main() { t1(); return v1; } |
| EOF |
| $CC -Os -c -fwhole-program $TMPFILE2 -o $TMPFILE2o > /dev/null 2>&1 |
| $CC -nostdlib -Os $TMPFILE1o $TMPFILE2o -o $TMPFILE3o > /dev/null 2>&1 |
| if [ $? -ne 0 ]; then |
| echo " Working around non-functional -fwhole-program" > /dev/fd/2 |
| echo 2 |
| exit 0 |
| fi |
| |
| # Test if "-combine" works. On Ubuntu 8.04 the compiler doesn't work |
| # correctly with combine and the "struct bregs" register due to the |
| # anonymous unions and structs. |
| mkdir -p out |
| cat - > $TMPFILE1 <<EOF |
| struct ts { union { int u1; struct { int u2; }; }; }; |
| void t1(struct ts *r); |
| EOF |
| $CC -c -fwhole-program -combine $TMPFILE1 $TMPFILE1 -o $TMPFILE1o > /dev/null 2>&1 |
| if [ $? -eq 0 ]; then |
| echo 0 |
| else |
| echo " Working around non-functional -combine" > /dev/fd/2 |
| echo 1 |
| fi |
| |
| # Also, the Ubuntu 8.04 compiler has a bug causing corruption when the |
| # "ebp" register is clobberred in an "asm" statement. The code has |
| # been modified to not clobber "ebp" - no test is available yet. |
| |
| rm -f $TMPFILE1 $TMPFILE1o $TMPFILE2 $TMPFILE2o $TMPFILE3o |