| dnl grub_ASM_USCORE checks if C symbols get an underscore after |
| dnl compiling to assembler. |
| dnl Written by Pavel Roskin. Based on grub_ASM_EXT_C written by |
| dnl Erich Boleyn and modified by OKUJI Yoshinori |
| AC_DEFUN(grub_ASM_USCORE, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING([if C symbols get an underscore after compilation]) |
| AC_CACHE_VAL(grub_cv_asm_uscore, |
| [cat > conftest.c <<\EOF |
| int |
| func (int *list) |
| { |
| *list = 0; |
| return *list; |
| } |
| EOF |
| |
| if AC_TRY_COMMAND([${CC-cc} ${CFLAGS} -S conftest.c]) && test -s conftest.s; then |
| true |
| else |
| AC_MSG_ERROR([${CC-cc} failed to produce assembly code]) |
| fi |
| |
| if grep _func conftest.s >/dev/null 2>&1; then |
| grub_cv_asm_uscore=yes |
| else |
| grub_cv_asm_uscore=no |
| fi |
| |
| rm -f conftest*]) |
| |
| if test "x$grub_cv_asm_uscore" = xyes; then |
| AC_DEFINE_UNQUOTED([HAVE_ASM_USCORE], $grub_cv_asm_uscore, |
| [Define if C symbols get an underscore after compilation]) |
| fi |
| |
| AC_MSG_RESULT([$grub_cv_asm_uscore]) |
| ]) |
| |
| |
| dnl Some versions of `objcopy -O binary' vary their output depending |
| dnl on the link address. |
| AC_DEFUN(grub_PROG_OBJCOPY_ABSOLUTE, |
| [AC_MSG_CHECKING([whether ${OBJCOPY} works for absolute addresses]) |
| AC_CACHE_VAL(grub_cv_prog_objcopy_absolute, |
| [cat > conftest.c <<\EOF |
| void |
| cmain (void) |
| { |
| *((int *) 0x1000) = 2; |
| } |
| EOF |
| |
| if AC_TRY_EVAL(ac_compile) && test -s conftest.o; then : |
| else |
| AC_MSG_ERROR([${CC-cc} cannot compile C source code]) |
| fi |
| grub_cv_prog_objcopy_absolute=yes |
| for link_addr in 2000 8000 7C00; do |
| if AC_TRY_COMMAND([${CC-cc} ${CFLAGS} -nostdlib -Wl,-N -Wl,-Ttext -Wl,$link_addr conftest.o -o conftest.exec]); then : |
| else |
| AC_MSG_ERROR([${CC-cc} cannot link at address $link_addr]) |
| fi |
| if AC_TRY_COMMAND([${OBJCOPY-objcopy} -O binary conftest.exec conftest]); then : |
| else |
| AC_MSG_ERROR([${OBJCOPY-objcopy} cannot create binary files]) |
| fi |
| if test ! -f conftest.old || AC_TRY_COMMAND([cmp -s conftest.old conftest]); then |
| mv -f conftest conftest.old |
| else |
| grub_cv_prog_objcopy_absolute=no |
| break |
| fi |
| done |
| rm -f conftest*]) |
| AC_MSG_RESULT([$grub_cv_prog_objcopy_absolute])]) |
| |
| dnl Mass confusion! |
| dnl Older versions of GAS interpret `.code16' to mean ``generate 32-bit |
| dnl instructions, but implicitly insert addr32 and data32 bytes so |
| dnl that the code works in real mode''. |
| dnl |
| dnl Newer versions of GAS interpret `.code16' to mean ``generate 16-bit |
| dnl instructions,'' which seems right. This requires the programmer |
| dnl to explicitly insert addr32 and data32 instructions when they want |
| dnl them. |
| dnl |
| dnl We only support the newer versions, because the old versions cause |
| dnl major pain, by requiring manual assembly to get 16-bit instructions into |
| dnl stage1/stage1.S. |
| AC_DEFUN(grub_ASM_ADDR32, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([grub_ASM_PREFIX_REQUIREMENT]) |
| AC_MSG_CHECKING([for .code16 addr32 assembler support]) |
| AC_CACHE_VAL(grub_cv_asm_addr32, |
| [cat > conftest.s.in <<\EOF |
| .code16 |
| l1: @ADDR32@ movb %al, l1 |
| EOF |
| |
| if test "x$grub_cv_asm_prefix_requirement" = xyes; then |
| sed -e s/@ADDR32@/addr32/ < conftest.s.in > conftest.s |
| else |
| sed -e s/@ADDR32@/addr32\;/ < conftest.s.in > conftest.s |
| fi |
| |
| if AC_TRY_COMMAND([${CC-cc} ${CFLAGS} -c conftest.s]) && test -s conftest.o; then |
| grub_cv_asm_addr32=yes |
| else |
| grub_cv_asm_addr32=no |
| fi |
| |
| rm -f conftest*]) |
| |
| AC_MSG_RESULT([$grub_cv_asm_addr32])]) |
| |
| dnl |
| dnl Later versions of GAS requires that addr32 and data32 prefixes |
| dnl appear in the same lines as the instructions they modify, while |
| dnl earlier versions requires that they appear in separate lines. |
| AC_DEFUN(grub_ASM_PREFIX_REQUIREMENT, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING(dnl |
| [whether addr32 must be in the same line as the instruction]) |
| AC_CACHE_VAL(grub_cv_asm_prefix_requirement, |
| [cat > conftest.s <<\EOF |
| .code16 |
| l1: addr32 movb %al, l1 |
| EOF |
| |
| if AC_TRY_COMMAND([${CC-cc} ${CFLAGS} -c conftest.s]) && test -s conftest.o; then |
| grub_cv_asm_prefix_requirement=yes |
| else |
| grub_cv_asm_prefix_requirement=no |
| fi |
| |
| rm -f conftest*]) |
| |
| if test "x$grub_cv_asm_prefix_requirement" = xyes; then |
| grub_tmp_addr32="addr32" |
| grub_tmp_data32="data32" |
| else |
| grub_tmp_addr32="addr32;" |
| grub_tmp_data32="data32;" |
| fi |
| |
| AC_DEFINE_UNQUOTED([ADDR32], $grub_tmp_addr32, |
| [Define it to \"addr32\" or \"addr32;\" to make GAS happy]) |
| AC_DEFINE_UNQUOTED([DATA32], $grub_tmp_data32, |
| [Define it to \"data32\" or \"data32;\" to make GAS happy]) |
| |
| AC_MSG_RESULT([$grub_cv_asm_prefix_requirement])]) |
| |
| dnl |
| dnl Older versions of GAS require that absolute indirect calls/jumps are |
| dnl not prefixed with `*', while later versions warn if not prefixed. |
| AC_DEFUN(grub_ASM_ABSOLUTE_WITHOUT_ASTERISK, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING(dnl |
| [whether an absolute indirect call/jump must not be prefixed with an asterisk]) |
| AC_CACHE_VAL(grub_cv_asm_absolute_without_asterisk, |
| [cat > conftest.s <<\EOF |
| lcall *(offset) |
| offset: |
| .long 0 |
| .word 0 |
| EOF |
| |
| if AC_TRY_COMMAND([${CC-cc} ${CFLAGS} -c conftest.s]) && test -s conftest.o; then |
| grub_cv_asm_absolute_without_asterisk=no |
| else |
| grub_cv_asm_absolute_without_asterisk=yes |
| fi |
| |
| rm -f conftest*]) |
| |
| if test "x$grub_cv_asm_absolute_without_asterisk" = xyes; then |
| AC_DEFINE([ABSOLUTE_WITHOUT_ASTERISK]) |
| fi |
| |
| AC_MSG_RESULT([$grub_cv_asm_absolute_without_asterisk])]) |
| |
| dnl |
| dnl grub_CHECK_START_SYMBOL checks if start is automatically defined by |
| dnl the compiler. |
| dnl Written by OKUJI Yoshinori |
| AC_DEFUN(grub_CHECK_START_SYMBOL, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING([if start is defined by the compiler]) |
| AC_CACHE_VAL(grub_cv_check_start_symbol, |
| [AC_TRY_LINK([], [asm ("incl start")], |
| grub_cv_check_start_symbol=yes, |
| grub_cv_check_start_symbol=no)]) |
| |
| if test "x$grub_cv_check_start_symbol" = xyes; then |
| AC_DEFINE([HAVE_START_SYMBOL]) |
| fi |
| |
| AC_MSG_RESULT([$grub_cv_check_start_symbol]) |
| ]) |
| |
| dnl |
| dnl grub_CHECK_USCORE_START_SYMBOL checks if _start is automatically |
| dnl defined by the compiler. |
| dnl Written by OKUJI Yoshinori |
| AC_DEFUN(grub_CHECK_USCORE_START_SYMBOL, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING([if _start is defined by the compiler]) |
| AC_CACHE_VAL(grub_cv_check_uscore_start_symbol, |
| [AC_TRY_LINK([], [asm ("incl _start")], |
| grub_cv_check_uscore_start_symbol=yes, |
| grub_cv_check_uscore_start_symbol=no)]) |
| |
| if test "x$grub_cv_check_uscore_start_symbol" = xyes; then |
| AC_DEFINE([HAVE_USCORE_START_SYMBOL]) |
| fi |
| |
| AC_MSG_RESULT([$grub_cv_check_uscore_start_symbol]) |
| ]) |
| |
| dnl |
| dnl grub_CHECK_USCORE_USCORE_BSS_START_SYMBOL checks if __bss_start is |
| dnl automatically defined by the compiler. |
| dnl Written by Michael Hohmoth. |
| AC_DEFUN(grub_CHECK_USCORE_USCORE_BSS_START_SYMBOL, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING([if __bss_start is defined by the compiler]) |
| AC_CACHE_VAL(grub_cv_check_uscore_uscore_bss_start_symbol, |
| [AC_TRY_LINK([], [asm ("incl __bss_start")], |
| grub_cv_check_uscore_uscore_bss_start_symbol=yes, |
| grub_cv_check_uscore_uscore_bss_start_symbol=no)]) |
| |
| if test "x$grub_cv_check_uscore_uscore_bss_start_symbol" = xyes; then |
| AC_DEFINE([HAVE_USCORE_USCORE_BSS_START_SYMBOL]) |
| fi |
| |
| AC_MSG_RESULT([$grub_cv_check_uscore_uscore_bss_start_symbol]) |
| ]) |
| |
| dnl |
| dnl grub_CHECK_EDATA_SYMBOL checks if edata is automatically defined by the |
| dnl compiler. |
| dnl Written by Michael Hohmuth. |
| AC_DEFUN(grub_CHECK_EDATA_SYMBOL, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING([if edata is defined by the compiler]) |
| AC_CACHE_VAL(grub_cv_check_edata_symbol, |
| [AC_TRY_LINK([], [asm ("incl edata")], |
| grub_cv_check_edata_symbol=yes, |
| grub_cv_check_edata_symbol=no)]) |
| |
| if test "x$grub_cv_check_edata_symbol" = xyes; then |
| AC_DEFINE([HAVE_EDATA_SYMBOL]) |
| fi |
| |
| AC_MSG_RESULT([$grub_cv_check_edata_symbol]) |
| ]) |
| |
| dnl |
| dnl grub_CHECK_USCORE_EDATA_SYMBOL checks if _edata is automatically |
| dnl defined by the compiler. |
| dnl Written by Michael Hohmuth. |
| AC_DEFUN(grub_CHECK_USCORE_EDATA_SYMBOL, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING([if _edata is defined by the compiler]) |
| AC_CACHE_VAL(grub_cv_check_uscore_edata_symbol, |
| [AC_TRY_LINK([], [asm ("incl _edata")], |
| grub_cv_check_uscore_edata_symbol=yes, |
| grub_cv_check_uscore_edata_symbol=no)]) |
| |
| if test "x$grub_cv_check_uscore_edata_symbol" = xyes; then |
| AC_DEFINE([HAVE_USCORE_EDATA_SYMBOL]) |
| fi |
| |
| AC_MSG_RESULT([$grub_cv_check_uscore_edata_symbol]) |
| ]) |
| |
| dnl |
| dnl grub_CHECK_END_SYMBOL checks if end is automatically defined by the |
| dnl compiler. |
| dnl Written by OKUJI Yoshinori |
| AC_DEFUN(grub_CHECK_END_SYMBOL, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING([if end is defined by the compiler]) |
| AC_CACHE_VAL(grub_cv_check_end_symbol, |
| [AC_TRY_LINK([], [asm ("incl end")], |
| grub_cv_check_end_symbol=yes, |
| grub_cv_check_end_symbol=no)]) |
| |
| if test "x$grub_cv_check_end_symbol" = xyes; then |
| AC_DEFINE([HAVE_END_SYMBOL]) |
| fi |
| |
| AC_MSG_RESULT([$grub_cv_check_end_symbol]) |
| ]) |
| |
| dnl |
| dnl grub_CHECK_USCORE_END_SYMBOL checks if _end is automatically defined |
| dnl by the compiler. |
| dnl Written by OKUJI Yoshinori |
| AC_DEFUN(grub_CHECK_USCORE_END_SYMBOL, |
| [AC_REQUIRE([AC_PROG_CC]) |
| AC_MSG_CHECKING([if _end is defined by the compiler]) |
| AC_CACHE_VAL(grub_cv_check_uscore_end_symbol, |
| [AC_TRY_LINK([], [asm ("incl _end")], |
| grub_cv_check_uscore_end_symbol=yes, |
| grub_cv_check_uscore_end_symbol=no)]) |
| |
| if test "x$grub_cv_check_uscore_end_symbol" = xyes; then |
| AC_DEFINE([HAVE_USCORE_END_SYMBOL]) |
| fi |
| |
| AC_MSG_RESULT([$grub_cv_check_uscore_end_symbol]) |
| ]) |
| |
| dnl grub_DEFINE_FILE(MACRO_NAME, FILE_NAME) |
| dnl grub_DEFINE_FILE defines a macro as the contents of a file safely. |
| dnl Replace some escape sequences, because autoconf doesn't handle them |
| dnl gracefully. |
| dnl Written by OKUJI Yoshinori. |
| AC_DEFUN(grub_DEFINE_FILE, |
| [AC_REQUIRE([AC_PROG_CC]) |
| # Because early versions of GNU sed 3.x are too buggy, use a C program |
| # instead of shell commands. *sigh* |
| cat >conftest.c <<\EOF |
| #include <stdio.h> |
| |
| int |
| main (void) |
| { |
| int c; |
| |
| while ((c = getchar ()) != EOF) |
| { |
| switch (c) |
| { |
| case '\n': |
| fputs ("\\n", stdout); |
| break; |
| case '\r': |
| fputs ("\\r", stdout); |
| break; |
| case '\\': |
| fputs ("\\\\", stdout); |
| break; |
| case '"': |
| fputs ("\\\"", stdout); |
| break; |
| default: |
| putchar (c); |
| } |
| } |
| |
| return 0; |
| } |
| EOF |
| |
| if AC_TRY_COMMAND([${CC-cc} ${CFLAGS} conftest.c -o conftest]) && test -s conftest; then |
| grub_tmp_value=`./conftest < "[$2]"` |
| else |
| AC_MSG_ERROR([${CC-cc} failed to produce an executable file]) |
| fi |
| |
| AC_DEFINE_UNQUOTED([$1], "$grub_tmp_value") |
| rm -f conftest* |
| ]) |