X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=aclocal.m4;h=1e01c26615b2a99387c521d79459250caac72e50;hb=684a312611200420dc192d9e77801cd21969f1a5;hp=8d3c106985a8031e7f7cb325ce3f519c09204fe9;hpb=bc9925ed623647b67481bbc6426a2a72371f908a;p=ghc-hetmet.git diff --git a/aclocal.m4 b/aclocal.m4 index 8d3c106..1e01c26 100644 --- a/aclocal.m4 +++ b/aclocal.m4 @@ -1,4 +1,4 @@ -dnl $Id: aclocal.m4,v 1.24 1998/08/06 10:28:34 simonm Exp $ +dnl $Id: aclocal.m4,v 1.36 1999/01/11 10:15:04 sof Exp $ dnl dnl Extra autoconf macros for the Glasgow fptools dnl @@ -6,23 +6,6 @@ dnl To be a good autoconf citizen, names of local macros have dnl prefixed with FPTOOLS_ to ensure we don't clash dnl with any pre-supplied autoconf ones. -dnl -dnl Are we running under the GNU libc? Need -D_GNU_SOURCE to get -dnl caddr_t and such. -dnl -AC_DEFUN(FPTOOLS_GNU_LIBC, -[AC_CACHE_CHECK([GNU libc], fptools_cv_gnu_libc, -[AC_EGREP_CPP(yes, -[#include -#ifdef __GLIBC__ -yes -#endif -], fptools_cv_gnu_libc=yes, fptools_cv_gnu_libc=no)]) -if test "$fptools_cv_gnu_libc" = yes; then - AC_DEFINE(_GNU_SOURCE) -fi -]) - dnl dnl Has timezone the type time_t or long (HP-UX 10.20 apparently dnl has `long'..) @@ -67,6 +50,7 @@ if test "$fptools_cv_altzone" = yes; then fi ]) + dnl ** check for leading underscores in symbol names dnl dnl Test for determining whether symbol names have a leading @@ -74,6 +58,11 @@ dnl underscore. dnl dnl We assume that they _haven't_ if anything goes wrong. dnl +dnl Some nlist implementations seem to try to be compatible by ignoring +dnl a leading underscore sometimes (eg. FreeBSD). We therefore have +dnl to work around this by checking for *no* leading underscore first. +dnl Sigh. --SDM +dnl AC_DEFUN(FPTOOLS_UNDERSCORE, [AC_CHECK_LIB(elf, nlist, LIBS="-lelf $LIBS")dnl AC_CACHE_CHECK([leading underscore in symbol names], fptools_cv_lead_uscore, @@ -82,17 +71,21 @@ dnl dnl Hack!: nlist() under Digital UNIX insist on there being an _, dnl but symbol table listings shows none. What is going on here?!? dnl +dnl Another hack: cygwin doesn't come with nlist.h , so we hardwire +dnl the underscoredness of that "platform" changequote(<<, >>)dnl << case $HostPlatform in alpha-dec-osf*) fptools_cv_lead_uscore='no';; +*cygwin32) fptools_cv_lead_uscore='yes';; *) >> changequote([, ])dnl AC_TRY_RUN([#ifdef HAVE_NLIST_H #include changequote(<<, >>)dnl << -struct nlist xYzzY[] = {{"_xYzzY", 0},{0}}; +struct nlist xYzzY1[] = {{"xYzzY1", 0},{0}}; +struct nlist xYzzY2[] = {{"_xYzzY2", 0},{0}}; #endif main(argc, argv) @@ -100,7 +93,9 @@ int argc; char **argv; { #ifdef HAVE_NLIST_H - if(nlist(argv[0], xYzzY) == 0 && xYzzY[0].n_value != 0) + if(nlist(argv[0], xYzzY1) == 0 && xYzzY1[0].n_value != 0) + exit(1); + if(nlist(argv[0], xYzzY2) == 0 && xYzzY2[0].n_value != 0) exit(0);>> changequote([, ])dnl #endif @@ -297,7 +292,7 @@ AC_DEFUN(FPTOOLS_PROG_GNUCPP, echo > conftest.c gcc -v -E conftest.c >/dev/null 2>conftest.out # \x5c = backslash - echo 'tr/\x5c/\//; /(\S+\/cpp)/ && print "[$]1";' > conftest.pl + echo 'tr/\x5c/\//; /(\S+\/)cpp/ && print "[$]{1}cpp -iprefix [$]1";' > conftest.pl fptools_cv_gnu_cpp="`eval $PerlCmd -n conftest.pl conftest.out`" rm -fr conftest* else @@ -413,3 +408,198 @@ if test "$fptools_cv_have_long_long" = yes; then AC_DEFINE(HAVE_LONG_LONG) fi ]) + +dnl *** Can we open files in binary mode? *** +dnl +AC_DEFUN(FPTOOLS_O_BINARY, +[ +AC_REQUIRE([AC_PROG_CC]) +AC_MSG_CHECKING(whether we can open files in binary mode) +AC_CACHE_VAL(fptools_cv_have_o_binary, +[ +AC_LANG_SAVE +AC_LANG_C +AC_TRY_COMPILE(, +[#ifdef HAVE_FCNTL_H +#include +#endif +int x = O_BINARY;], +fptools_cv_have_o_binary=yes, +fptools_cv_have_o_binary=no) +AC_LANG_RESTORE +]) +AC_MSG_RESULT($fptools_cv_have_o_binary) +if test "$fptools_cv_have_o_binary" = yes; then +AC_DEFINE(HAVE_O_BINARY) +fi +]) + +dnl *** Which one comes first, .text or .data? *** +dnl +AC_DEFUN(FPTOOLS_CODE_BEFORE_DATA, +[AC_CACHE_CHECK([if code section appears before data], fptools_cv_code_bef_data, +[AC_TRY_RUN([ +int f() { return 1; } +int i; +int main() { return ((char*)&f > (char*)&i); } + +], +fptools_cv_code_bef_data=yes, fptools_cv_code_bef_data=no,false)]) +if test "$fptools_cv_code_bef_data" = yes; then + AC_DEFINE(CODE_BEFORE_DATA) +fi +]) + +dnl *** Helper function ** +dnl +AC_DEFUN(FPTOOLS_IN_SCOPE,AC_TRY_LINK([extern char* $1;],[return (int)&$2], $3=yes, $3=no)) + +dnl *** What's the end-of-text-section marker called? *** +dnl +AC_DEFUN(FPTOOLS_END_TEXT_SECTION, +[AC_MSG_CHECKING([for end of text section marker]) +not_done=1 +for i in etext _etext __etext; do + FPTOOLS_IN_SCOPE($i,$i,fptools_end_of_text) + if test "$fptools_end_of_text" = yes; then + AC_CACHE_VAL([fptools_cv_end_of_text_decl], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER_DECL, $i)) + AC_CACHE_VAL([fptools_cv_end_of_text], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER, $i)) + not_done=0 + break + fi +done +if test "$not_done" = 1; then +FPTOOLS_IN_SCOPE(etext asm("etext"),etext,fptools_end_of_text); +if test "$fptools_end_of_text" = yes; then + AC_CACHE_VAL([fptools_cv_end_of_text], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER, etext)) + AC_CACHE_VAL([fptools_cv_end_of_text_decl], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER_DECL, etext asm("etext"))) +else + AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER_DECL, dunno_what_it_is) + AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER, dunno_what_it_is) +fi +fi +AC_MSG_RESULT([$]fptools_cv_end_of_text) +]) + +dnl *** What's the end-of-data-section marker called? *** +dnl +AC_DEFUN(FPTOOLS_END_DATA_SECTION, +[AC_MSG_CHECKING([for end of data section marker]) +not_done=1 +for i in end _end __end; do + FPTOOLS_IN_SCOPE($i,$i,fptools_end_of_data) + if test "$fptools_end_of_data" = yes; then + AC_CACHE_VAL([fptools_cv_end_of_data_decl], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER_DECL, $i)]) + AC_CACHE_VAL([fptools_cv_end_of_data], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER, $i)]) + not_done=0 + break + fi +done +if test "$not_done" = 1; then +FPTOOLS_IN_SCOPE(end asm("end"),end,fptools_end_of_data); +if test "$fptools_end_of_data" = yes; then + AC_CACHE_VAL([fptools_cv_end_of_data_decl], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER_DECL, end asm("end"))]) + AC_CACHE_VAL([fptools_cv_end_of_data], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER, end)]) +else + AC_CACHE_VAL([fptools_cv_end_of_data_decl], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER_DECL, dunno_what_it_is)]) + AC_CACHE_VAL([fptools_cv_end_of_data], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER, dunno_what_it_is)]) +fi +fi +AC_MSG_RESULT([$]fptools_cv_end_of_data) +]) + + + +dnl Based on AC_TRY_LINK - run iftrue if links cleanly with no warning + +dnl FPTOOLS_TRY_LINK_NOWARN(flags,main?,iftrue,iffalse) + +AC_DEFUN(FPTOOLS_TRY_LINK_NOWARN, +[ +ac_save_LIBS="$LIBS" +LIBS=[$1]; +cat > conftest.$ac_ext <