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configure.ac: drop -O3; it is excessive and produces huge code

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There is no reason to use -O3; it causes code to be insanely
duplicated. Simplify the configure.ac file too.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
H. Peter Anvin 2018-06-14 19:19:09 -07:00
parent 58ab877402
commit 48fd154d1c
1 changed files with 10 additions and 11 deletions
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21
configure.ac
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@ -24,24 +24,23 @@ AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_INSTALL
dnl If the user did not specify a CFLAGS default, change default -O2
dnl to either -O3 (normal) or -O0 (for debugging)
pa_no_optimize=false
dnl If the user did not specify a CFLAGS default, change default
dnl to -O0 for debugging
PA_ARG_DISABLED([optimization],
[compile without optimization (-O0) to help debugging],
[pa_optimize=-O0], [pa_optimize=-O3])
[pa_no_optimize=true])
dnl Compile and link with dwarf debug
PA_ARG_ENABLED([gdb],
[disable optimization and compile with extra debug information for GDB debugger],
[pa_optimize='-O0'
PA_ADD_CFLAGS([-ggdb3])
])
[PA_ADD_CFLAGS([-ggdb3])
pa_no_optimize=true])
AS_IF([test x"$pa_init_cflags" = x],
[CFLAGS=`echo "$CFLAGS" | sed -e "s/-O2/$pa_optimize/"`])
AS_IF([test x"$pa_optimize" = "x-O0"],
[PA_ADD_CFLAGS([-fno-omit-frame-pointer])])
AS_IF([$pa_no_optimize],
[PA_ADD_CFLAGS([-O0])
PA_ADD_CFLAGS([-fno-omit-frame-pointer])])
dnl Abort on panic
PA_ARG_ENABLED([panic-abort],