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* Don't merge constants (pass -fno-merge-constants to the compiler) since

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it breaks B2 in fpu/fpu_x86.cpp on the second call to fpu_init(), at the
  fsave instruction. This problem appeared with the following compilers:
  - "Official" : gcc-3.1 (mainline CVS)
  - Mandrake   : gcc-2.96 >= 0.59mdk, gcc-3.0.1 >= 0.1mdk
  - Red Hat    : gcc-2.96 >= 89, gcc-3.0 >= 1
This commit is contained in:
gbeauche 2001-08-02 13:52:24 +00:00
parent 52e18c5874
commit d64a00ed62
1 changed files with 29 additions and 0 deletions
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29
BasiliskII/src/Unix/configure.in
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@ -650,12 +650,40 @@ AC_EGREP_CPP(yes,
#endif
], [AC_MSG_RESULT(yes); HAVE_GCC27=yes], AC_MSG_RESULT(no))
dnl Check for GCC 3.0 or higher.
HAVE_GCC30=no
AC_MSG_CHECKING(for GCC 3.0 or higher)
AC_EGREP_CPP(yes,
[#if __GNUC__ >= 3
yes
#endif
], [AC_MSG_RESULT(yes); HAVE_GCC30=yes], AC_MSG_RESULT(no))
dnl Set "-fomit-frame-pointer" on i386 GCC 2.7 or higher.
if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" ]]; then
CFLAGS="$CFLAGS -fomit-frame-pointer"
CXXFLAGS="$CXXFLAGS -fomit-frame-pointer"
fi
dnl (gb) Do not merge constants since it breaks fpu/fpu_x86.cpp.
dnl As of 2001/08/02, this affects the following compilers:
dnl Official: probably gcc-3.1 (mainline CVS)
dnl Mandrake: gcc-2.96 >= 0.59mdk, gcc-3.0.1 >= 0.1mdk
dnl Red Hat : gcc-2.96 >= 89, gcc-3.0 >= 1
if [[ "x$HAVE_GCC27" = "xyes" ]]; then
SAVED_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CFLAGS -fno-merge-constants"
AC_CACHE_CHECK([whether GCC supports constants merging], ac_cv_gcc_constants_merging, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([],[],[ac_cv_gcc_constants_merging=yes],[ac_cv_gcc_constants_merging=no])
AC_LANG_RESTORE
])
if [[ "x$ac_cv_gcc_constants_merging" != "xyes" ]]; then
CXXFLAGS="$SAVED_CXXFLAGS"
fi
fi
dnl Select appropriate CPU source and REGPARAM define.
ASM_OPTIMIZATIONS=none
CPUSRCS="cpuemu1.cpp cpuemu2.cpp cpuemu3.cpp cpuemu4.cpp cpuemu5.cpp cpuemu6.cpp cpuemu7.cpp cpuemu8.cpp"
@ -706,6 +734,7 @@ if [[ "x$FPE_CORE" = "xdefault" ]]; then
DEFINES="$DEFINES -DFPU_X86"
FPE_CORE_STR="i386 optimized core"
FPUSRCS="../uae_cpu/fpu/fpu_x86.cpp"
FPE_CORE="i386"
else
FPE_CORE="uae"
fi