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1.1 root 1: #!/bin/sh
2: # Script to test if gcc "-fwhole-program" works properly.
3:
4: mkdir -p out
5: TMPFILE1=out/tmp_testcompile1.c
6: TMPFILE1o=out/tmp_testcompile1.o
1.1.1.3 ! root 7: TMPFILE1_ld=out/tmp_testcompile1.lds
1.1 root 8: TMPFILE2=out/tmp_testcompile2.c
9: TMPFILE2o=out/tmp_testcompile2.o
10: TMPFILE3o=out/tmp_testcompile3.o
11:
1.1.1.3 ! root 12: # Test if ld's alignment handling is correct. This is a known problem
! 13: # with the linker that ships with Ubuntu 11.04.
! 14: cat - > $TMPFILE1 <<EOF
! 15: const char v1[] __attribute__((section(".text.v1"))) = "0123456789";
! 16: const char v2[] __attribute__((section(".text.v2"))) = "0123456789";
! 17: EOF
! 18: cat - > $TMPFILE1_ld <<EOF
! 19: SECTIONS
! 20: {
! 21: .mysection 0x88f0 : {
! 22: . = 0x10 ;
! 23: *(.text.v1)
! 24: . = 0x20 ;
! 25: *(.text.v2)
! 26: . = 0x30 ;
! 27: }
! 28: }
! 29: EOF
! 30: $CC -O -g -c $TMPFILE1 -o $TMPFILE1o > /dev/null 2>&1
! 31: $LD -T $TMPFILE1_ld $TMPFILE1o -o $TMPFILE2o > /dev/null 2>&1
! 32: if [ $? -ne 0 ]; then
! 33: echo "The version of LD on this system does not properly handle" > /dev/fd/2
! 34: echo "alignments. As a result, this project can not be built." > /dev/fd/2
! 35: echo "" > /dev/fd/2
! 36: echo "The problem may be the result of this LD bug report:" > /dev/fd/2
! 37: echo " http://sourceware.org/bugzilla/show_bug.cgi?id=12726" > /dev/fd/2
! 38: echo "" > /dev/fd/2
! 39: echo "Please update to a working version of binutils and retry." > /dev/fd/2
! 40: echo -1
! 41: exit 0
! 42: fi
! 43:
1.1 root 44: # Test for "-fwhole-program". Older versions of gcc (pre v4.1) don't
45: # support the whole-program optimization - detect that.
46: $CC -fwhole-program -S -o /dev/null -xc /dev/null > /dev/null 2>&1
47: if [ $? -ne 0 ]; then
48: echo " Working around no -fwhole-program" > /dev/fd/2
49: echo 2
50: exit 0
51: fi
52:
53: # Test if "visible" variables and functions are marked global. On
54: # OpenSuse 10.3 "visible" variables declared with "extern" first
55: # aren't marked as global in the resulting assembler. On Ubuntu 7.10
56: # "visible" functions aren't marked as global in the resulting
57: # assembler.
58: cat - > $TMPFILE1 <<EOF
59: void __attribute__((externally_visible)) t1() { }
60: extern unsigned char v1;
61: unsigned char v1 __attribute__((section(".data16.foo.19"))) __attribute__((externally_visible));
62: EOF
63: $CC -Os -c -fwhole-program $TMPFILE1 -o $TMPFILE1o > /dev/null 2>&1
64: cat - > $TMPFILE2 <<EOF
65: void t1();
66: extern unsigned char v1;
67: int __attribute__((externally_visible)) main() { t1(); return v1; }
68: EOF
69: $CC -Os -c -fwhole-program $TMPFILE2 -o $TMPFILE2o > /dev/null 2>&1
70: $CC -nostdlib -Os $TMPFILE1o $TMPFILE2o -o $TMPFILE3o > /dev/null 2>&1
71: if [ $? -ne 0 ]; then
72: echo " Working around non-functional -fwhole-program" > /dev/fd/2
73: echo 2
74: exit 0
75: fi
76:
77: # Test if "-combine" works. On Ubuntu 8.04 the compiler doesn't work
78: # correctly with combine and the "struct bregs" register due to the
79: # anonymous unions and structs. On Fedora Core 12 the compiler throws
80: # an internal compiler error when multiple files access global
81: # variables with debugging enabled.
82: cat - > $TMPFILE1 <<EOF
83: // Look for anonymous union/struct failure
84: struct ts { union { int u1; struct { int u2; }; }; };
85: void func1(struct ts *r);
86:
87: // Look for global variable failure.
88: struct s1_s { int v; } g1;
89: void __attribute__((externally_visible)) func2() {
90: struct s1_s *l1 = &g1;
1.1.1.2 root 91: l1->v=0;
1.1 root 92: }
93: EOF
94: cat - > $TMPFILE2 <<EOF
95: struct ts { union { int u1; struct { int u2; }; }; };
96: void func1(struct ts *r);
97:
98: extern struct s1_s g1;
99: void func3() {
100: &g1;
101: }
102: EOF
103: $CC -O -g -fwhole-program -combine -c $TMPFILE1 $TMPFILE2 -o $TMPFILE1o > /dev/null 2>&1
104: if [ $? -eq 0 ]; then
105: echo 0
106: else
107: echo " Working around non-functional -combine" > /dev/fd/2
108: echo 1
109: fi
110:
111: # Also, on several compilers, -combine fails if code is emitted with a
112: # reference to an extern variable that is later found to be externally
113: # visible - the compiler does not mark those variables as global.
114: # This is being worked around by ordering the compile objects to avoid
115: # this case.
116:
117: # Also, the Ubuntu 8.04 compiler has a bug causing corruption when the
118: # "ebp" register is clobberred in an "asm" statement. The code has
119: # been modified to not clobber "ebp" - no test is available yet.
120:
1.1.1.3 ! root 121: rm -f $TMPFILE1 $TMPFILE1o $TMPFILE1_ld $TMPFILE2 $TMPFILE2o $TMPFILE3o
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