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bug#40072: Incorrect escaping on MinGW 32-bit

From: Bob Friesenhahn
Subject: bug#40072: Incorrect escaping on MinGW 32-bit
Date: Sun, 15 Mar 2020 08:59:34 -0500 (CDT)
User-agent: Alpine 2.20 (GSO 67 2015-01-07)

On Sun, 15 Mar 2020, Jeffrey Walton wrote:

Hi Everyone,

I'm working on a MSYS2 system on a Windows 7 host. MSYS2 can be
obtained at https://www.msys2.org/. I'm using the environment from
msys2-i686-20190524.exe. After installing MSYS2, click the MinGW
32-bit link on the desktop.

After configuring Expat (https://github.com/libexpat/libexpat), make
is resulting in:

libtool: link: gcc -g -O2 -Wall -Wextra -fexceptions -fno-strict-aliasing -Wmiss
ing-prototypes -Wstrict-prototypes -pedantic -Wduplicated-cond -Wduplicated-bran
ches -Wlogical-op -Wrestrict -Wnull-dereference -Wjump-misses-init -Wdouble-prom
otion -Wshadow -Wformat=2 -Wmisleading-indentation -fvisibility=hidden -DXML_ENA
BLE_VISIBILITY=1 -fno-strict-aliasing -o .libs/xmlwf.exe xmlwf-xmlwf.o xmlwf-xml
file.o xmlwf-codepage.o xmlwf-unixfilemap.o  ../lib/.libs/libexpat.dll.a -L/ming
./.libs/lt-xmlwf.c:164:35: error: expected ',' or ';' before 'C'
 164 | const char * LIB_PATH_VALUE   = ""C:\\msys32\\home\\Jeffrey Walton\\libe

In my experience, Autotools has never supported paths which include spaces. This is just too hard to fix given that the shell splits arguments on white-space by default. Even if Autoconf, Automake, and Libtool where to somehow fix this problem for a well-crafted package, it would almost certainly fail once the configure script uses any shell content other than the provided macros.

There was already a challenge to solve given that backslash has special meaning to the shell.

For my purposes I made sure that my default Windows login directory does not include spaces in the path, but I also created a new directory path for builds which does not include spaces in the path and has Windows Defender scaning and automatic indexing disabled.

Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
Public Key,     http://www.simplesystems.org/users/bfriesen/public-key.txt

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