From: Doan Tran Cong Danh <congdanhqx@gmail.com>
To: git@vger.kernel.org
Cc: Doan Tran Cong Danh <congdanhqx@gmail.com>
Subject: [PATCH v4 2/8] configure.ac: define ICONV_OMITS_BOM if necessary
Date: Thu, 7 Nov 2019 09:56:13 +0700 [thread overview]
Message-ID: <f07566c60c4421a5b33ef5c74a9a0a58947e7750.1573094789.git.congdanhqx@gmail.com> (raw)
In-Reply-To: <cover.1573094789.git.congdanhqx@gmail.com>
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, typing the flag all the time is cumbersome and error-prone.
Add a check into configure script to detect this flag automatically.
Signed-off-by: Doan Tran Cong Danh <congdanhqx@gmail.com>
---
configure.ac | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
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])
#
--
2.24.0.8.g36796e2b67
next prev parent reply other threads:[~2019-11-07 2:56 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-31 9:26 [PATCH 0/3] Linux with musl libc improvement Doan Tran Cong Danh
2019-10-31 9:26 ` [PATCH 1/3] t0028: eliminate non-standard usage of printf Doan Tran Cong Danh
2019-10-31 17:41 ` Jeff King
2019-11-01 1:33 ` Danh Doan
2019-10-31 19:50 ` brian m. carlson
2019-10-31 9:26 ` [PATCH 2/3] configure.ac: define ICONV_OMITS_BOM if necessary Doan Tran Cong Danh
2019-10-31 18:11 ` Jeff King
2019-10-31 20:02 ` brian m. carlson
2019-11-01 1:40 ` Danh Doan
2019-10-31 9:26 ` [PATCH 3/3] sequencer: reencode to utf-8 before arrange rebase's todo list Doan Tran Cong Danh
2019-10-31 10:38 ` Johannes Schindelin
2019-10-31 19:26 ` Jeff King
2019-11-01 4:49 ` Danh Doan
2019-11-01 8:25 ` [PATCH v2 0/3] Linux with musl libc improvement Doan Tran Cong Danh
2019-11-01 8:25 ` [PATCH v2 1/3] t0028: eliminate non-standard usage of printf Doan Tran Cong Danh
2019-11-01 16:54 ` Jeff King
2019-11-01 8:25 ` [PATCH v2 2/3] configure.ac: define ICONV_OMITS_BOM if necessary Doan Tran Cong Danh
2019-11-01 16:56 ` Jeff King
2019-11-02 0:43 ` Danh Doan
2019-11-01 8:25 ` [PATCH v2 3/3] sequencer: reencode to utf-8 before arrange rebase's todo list Doan Tran Cong Danh
2019-11-01 16:59 ` Jeff King
2019-11-02 1:02 ` Danh Doan
2019-11-02 12:20 ` Danh Doan
2019-11-05 8:00 ` Jeff King
2019-11-06 1:30 ` Junio C Hamano
2019-11-06 4:03 ` Jeff King
2019-11-06 10:03 ` Danh Doan
2019-11-07 5:56 ` Jeff King
2019-11-06 9:19 ` [PATCH v3 0/8] Correct internal working and output encoding Doan Tran Cong Danh
2019-11-06 9:19 ` [PATCH v3 1/8] t0028: eliminate non-standard usage of printf Doan Tran Cong Danh
2019-11-06 9:20 ` [PATCH v3 2/8] configure.ac: define ICONV_OMITS_BOM if necessary Doan Tran Cong Danh
2019-11-06 9:20 ` [PATCH v3 3/8] t3900: demonstrate git-rebase problem with multi encoding Doan Tran Cong Danh
2019-11-06 9:20 ` [PATCH v3 4/8] sequencer: reencode to utf-8 before arrange rebase's todo list Doan Tran Cong Danh
2019-11-06 9:20 ` [PATCH v3 5/8] sequencer: reencode revert/cherry-pick's " Doan Tran Cong Danh
2019-11-06 9:20 ` [PATCH v3 6/8] sequencer: reencode squashing commit's message Doan Tran Cong Danh
2019-11-06 9:20 ` [PATCH v3 7/8] sequencer: reencode old merge-commit message Doan Tran Cong Danh
2019-11-06 15:39 ` Eric Sunshine
2019-11-06 9:20 ` [PATCH v3 8/8] sequencer: reencode commit message for am/rebase --show-current-patch Doan Tran Cong Danh
2019-11-07 2:56 ` [PATCH v4 0/8] Correct internal working and output encoding Doan Tran Cong Danh
2019-11-07 2:56 ` [PATCH v4 1/8] t0028: eliminate non-standard usage of printf Doan Tran Cong Danh
2019-11-07 2:56 ` Doan Tran Cong Danh [this message]
2019-11-07 6:18 ` [PATCH v4 2/8] configure.ac: define ICONV_OMITS_BOM if necessary Junio C Hamano
2019-11-07 2:56 ` [PATCH v4 3/8] t3900: demonstrate git-rebase problem with multi encoding Doan Tran Cong Danh
2019-11-07 6:02 ` Jeff King
2019-11-07 6:48 ` Danh Doan
2019-11-07 8:02 ` Jeff King
2019-11-07 10:51 ` Danh Doan
2019-11-11 8:22 ` Jeff King
2019-11-07 2:56 ` [PATCH v4 4/8] sequencer: reencode to utf-8 before arrange rebase's todo list Doan Tran Cong Danh
2019-11-07 6:04 ` Jeff King
2019-11-07 2:56 ` [PATCH v4 5/8] sequencer: reencode revert/cherry-pick's " Doan Tran Cong Danh
2019-11-07 6:06 ` Jeff King
2019-11-07 2:56 ` [PATCH v4 6/8] sequencer: reencode squashing commit's message Doan Tran Cong Danh
2019-11-07 6:15 ` Jeff King
2019-11-07 2:56 ` [PATCH v4 7/8] sequencer: reencode old merge-commit message Doan Tran Cong Danh
2019-11-07 2:56 ` [PATCH v4 8/8] sequencer: reencode commit message for am/rebase --show-current-patch Doan Tran Cong Danh
2019-11-07 6:32 ` Jeff King
2019-11-07 7:48 ` Danh Doan
2019-11-07 8:03 ` Jeff King
2019-11-07 16:32 ` Danh Doan
2019-11-08 9:43 ` [PATCH v5 0/9] Improve odd encoding integration Doan Tran Cong Danh
2019-11-08 9:43 ` [PATCH v5 1/9] t0028: eliminate non-standard usage of printf Doan Tran Cong Danh
2019-11-08 9:43 ` [PATCH v5 2/9] configure.ac: define ICONV_OMITS_BOM if necessary Doan Tran Cong Danh
2019-11-08 9:43 ` [PATCH v5 3/9] t3900: demonstrate git-rebase problem with multi encoding Doan Tran Cong Danh
2019-11-08 9:43 ` [PATCH v5 4/9] sequencer: reencode to utf-8 before arrange rebase's todo list Doan Tran Cong Danh
2019-11-08 9:43 ` [PATCH v5 5/9] sequencer: reencode revert/cherry-pick's " Doan Tran Cong Danh
2019-11-08 9:43 ` [PATCH v5 6/9] sequencer: reencode squashing commit's message Doan Tran Cong Danh
2019-11-08 9:43 ` [PATCH v5 7/9] sequencer: reencode old merge-commit message Doan Tran Cong Danh
2019-11-08 9:43 ` [PATCH v5 8/9] sequencer: reencode commit message for am/rebase --show-current-patch Doan Tran Cong Danh
2019-11-08 9:43 ` [PATCH v5 9/9] sequencer: fallback to sane label in making rebase todo list Doan Tran Cong Danh
2019-11-11 1:22 ` [PATCH v5 0/9] Improve odd encoding integration Junio C Hamano
2019-11-11 4:02 ` Junio C Hamano
2019-11-11 4:43 ` Danh Doan
2019-11-11 6:14 ` Junio C Hamano
2019-11-11 6:03 ` [PATCH v6 0/9] sequencer: handle other encoding better Doan Tran Cong Danh
2019-11-11 6:03 ` [PATCH v6 1/9] t0028: eliminate non-standard usage of printf Doan Tran Cong Danh
2019-11-11 6:03 ` [PATCH v6 2/9] configure.ac: define ICONV_OMITS_BOM if necessary Doan Tran Cong Danh
2019-11-11 6:03 ` [PATCH v6 3/9] t3900: demonstrate git-rebase problem with multi encoding Doan Tran Cong Danh
2019-11-11 6:03 ` [PATCH v6 4/9] sequencer: reencode to utf-8 before arrange rebase's todo list Doan Tran Cong Danh
2019-11-11 6:03 ` [PATCH v6 5/9] sequencer: reencode revert/cherry-pick's " Doan Tran Cong Danh
2019-11-11 6:03 ` [PATCH v6 6/9] sequencer: reencode squashing commit's message Doan Tran Cong Danh
2019-11-11 6:03 ` [PATCH v6 7/9] sequencer: reencode old merge-commit message Doan Tran Cong Danh
2019-11-11 6:03 ` [PATCH v6 8/9] sequencer: reencode commit message for am/rebase --show-current-patch Doan Tran Cong Danh
2019-11-11 6:03 ` [PATCH v6 9/9] sequencer: fallback to sane label in making rebase todo list Doan Tran Cong Danh
2019-11-11 8:39 ` Jeff King
2019-11-11 16:22 ` Phillip Wood
2019-11-11 18:26 ` Johannes Schindelin
2019-11-12 4:17 ` Junio C Hamano
2019-11-11 8:40 ` [PATCH v6 0/9] sequencer: handle other encoding better Jeff King
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