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Improve cross-compilation support [once autoconf 2.70 is widespread] #1199

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Improve cross-compilation support [once autoconf 2.70 is widespread] #1199

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7 changes: 6 additions & 1 deletion INSTALL
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Original file line number Diff line number Diff line change
Expand Up @@ -64,12 +64,17 @@ This step is only needed if configure.ac has been changed, or if configure
does not exist (for example, when building from a git clone). The
configure script and config.h.in can be built by running:

...copy config.guess, config.sub, and install-sh from elsewhere
autoheader
autoconf

If you have a full GNU autotools install, you can alternatively run:

autoreconf
autoreconf -i

(With autoconf 2.70 or later, autoreconf -i/--install will create the
config.guess, etc files; with earlier versions you will need to copy them
from Gnulib, Autoconf, or elsewhere yourself.)

Basic Installation
==================
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1 change: 1 addition & 0 deletions README.md
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Expand Up @@ -28,6 +28,7 @@ committed to this repository, so building the code from a Git repository
requires extra steps:

```sh
cp ..etc.. . # Copy config.guess, config.sub, and install-sh from elsewhere
autoheader # If using configure, generate the header template...
autoconf # ...and configure script (or use autoreconf to do both)
./configure # Optional but recommended, for choosing extra functionality
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5 changes: 3 additions & 2 deletions config.mk.in
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Expand Up @@ -37,8 +37,9 @@ libexecdir = @libexecdir@
datarootdir = @datarootdir@
mandir = @mandir@

CC = @CC@
RANLIB = @RANLIB@
CC = @CC@
INSTALL = @INSTALL@
RANLIB = @RANLIB@

CPPFLAGS = @CPPFLAGS@
CFLAGS = @CFLAGS@
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7 changes: 4 additions & 3 deletions configure.ac
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Expand Up @@ -60,7 +60,9 @@ endif
EOF
AC_MSG_ERROR([$1], [$2])])

AC_CANONICAL_HOST
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_RANLIB

dnl Turn on compiler warnings, if possible
Expand Down Expand Up @@ -137,9 +139,8 @@ AC_ARG_ENABLE([s3],
[support Amazon AWS S3 URLs])],
[], [enable_s3=check])

basic_host=${host_alias:-unknown-`uname -s`}
AC_MSG_CHECKING([shared library type for $basic_host])
case $basic_host in
AC_MSG_CHECKING([shared library type${host_alias:+ for $host_alias}])
case $host in
*-cygwin* | *-CYGWIN*)
host_result="Cygwin DLL"
PLATFORM=CYGWIN
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