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| author | Doan Tran Cong Danh <congdanhqx@gmail.com> | 2019-11-08 16:43:44 +0700 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2019-11-11 09:43:47 +0900 |
| commit | 1ba6e7aecdd2c72df1b0da7a89502e82485f7819 (patch) | |
| tree | 062be3212005ec9ee857cfb511b8589af2b16425 /configure.ac | |
| parent | 99b2ba35f5a67dd6308b265a8e4c3a92e2e67221 (diff) | |
| download | git-1ba6e7aecdd2c72df1b0da7a89502e82485f7819.tar.gz | |
configure.ac: define ICONV_OMITS_BOM if necessary
From commit 79444c9294, ("utf8: handle systems that don't write BOM for
UTF-16", 2019-02-12), we're supporting those systems with iconv that
omits BOM with:
make ICONV_OMITS_BOM=Yes
However, configure script wasn't taught to detect those systems.
Teach configure to do so.
Signed-off-by: Doan Tran Cong Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index a43b476402..ecba7e6e51 100644 --- a/configure.ac +++ b/configure.ac @@ -844,12 +844,61 @@ AC_MSG_CHECKING([for old iconv()]) AC_COMPILE_IFELSE([OLDICONVTEST_SRC], [AC_MSG_RESULT([no])], [AC_MSG_RESULT([yes]) + AC_DEFINE(HAVE_OLD_ICONV, 1) OLD_ICONV=UnfortunatelyYes]) GIT_UNSTASH_FLAGS($ICONVDIR) GIT_CONF_SUBST([OLD_ICONV]) +# +# Define ICONV_OMITS_BOM if you are on a system which +# iconv omits bom for utf-{16,32} +if test -z "$NO_ICONV"; then +AC_CACHE_CHECK([whether iconv omits bom for utf-16 and utf-32], + [ac_cv_iconv_omits_bom], +[ +old_LIBS="$LIBS" +if test -n "$NEEDS_LIBICONV"; then + LIBS="$LIBS -liconv" +fi + +AC_RUN_IFELSE( + [AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT + #include <iconv.h> + #ifdef HAVE_OLD_ICONV + typedef const char *iconv_ibp; + #else + typedef char *iconv_ibp; + #endif + ], + [[ + int v; + iconv_t conv; + char in[] = "a"; iconv_ibp pin = in; + char out[20] = ""; char *pout = out; + size_t isz = sizeof in; + size_t osz = sizeof out; + + conv = iconv_open("UTF-16", "UTF-8"); + iconv(conv, &pin, &isz, &pout, &osz); + iconv_close(conv); + v = (unsigned char)(out[0]) + (unsigned char)(out[1]); + return v != 0xfe + 0xff; + ]])], + [ac_cv_iconv_omits_bom=no], + [ac_cv_iconv_omits_bom=yes]) + +LIBS="$old_LIBS" +]) +if test "x$ac_cv_iconv_omits_bom" = xyes; then + ICONV_OMITS_BOM=Yes +else + ICONV_OMITS_BOM= +fi +GIT_CONF_SUBST([ICONV_OMITS_BOM]) +fi + ## Checks for typedefs, structures, and compiler characteristics. AC_MSG_NOTICE([CHECKS for typedefs, structures, and compiler characteristics]) # |