[balsa] drop -ansi compile flag for building libimap

[Albrecht Dreß <albrecht src gnome org>]

commit 5f20702d013aa90420d5dddf509f34dec592a491
Author: Albrecht Dreß <albrecht dress arcor de>
Date:   Sun May 2 18:36:55 2021 +0200

    drop -ansi compile flag for building libimap
    
    See the discussion at
    https://gitlab.gnome.org/GNOME/balsa/-/issues/57#note_1066995
    
    Signed-off-by: Albrecht Dreß <albrecht dress arcor de>

 libbalsa/imap/Makefile.am | 2 +-
 libbalsa/imap/meson.build | 4 +---
 2 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/libbalsa/imap/Makefile.am b/libbalsa/imap/Makefile.am
index 436645bca..881c02763 100644
--- a/libbalsa/imap/Makefile.am
+++ b/libbalsa/imap/Makefile.am
@@ -41,4 +41,4 @@ AM_CPPFLAGS = -I${top_builddir} -I${top_srcdir} -I${top_srcdir}/libbalsa \
        -DG_LOG_DOMAIN=\"imap\" \
        $(BALSA_CFLAGS)
 
-AM_CFLAGS   = $(LIBIMAP_CFLAGS) -ansi
+AM_CFLAGS   = $(LIBIMAP_CFLAGS)
diff --git a/libbalsa/imap/meson.build b/libbalsa/imap/meson.build
index ed1e977d0..40b5033e9 100644
--- a/libbalsa/imap/meson.build
+++ b/libbalsa/imap/meson.build
@@ -21,10 +21,8 @@ libimap_a_sources = [
   'util.h'
   ]
 
-libimap_compile_arg = '-ansi'
 libimap_link_arg    = '-lz'
-libimap_compile_dep  = declare_dependency(compile_args : libimap_compile_arg,
-                                          link_args    : libimap_link_arg)
+libimap_compile_dep  = declare_dependency(link_args    : libimap_link_arg)
 
 libimap_a = static_library('imap', libimap_a_sources,
                            c_args              : '-DG_LOG_DOMAIN="imap"',