ncursesada 6.4, m4_tool external (#632)

* Add Alire support for NCursesAda source version.

* Add M4 dependency.
Windows is not supported for now.

* Leave M4 definition available for all OS.

* Enable m4 package for all package managers

Co-authored-by: GHA <actions@github.com>

index/m4/m4_tool/m4_tool-external.toml

@@ -0,0 +1,13 @@
+description = "macro processor"
+name = "m4_tool"
+maintainers = ["Pascal Pignard <blady.net@orange.fr>"]
+maintainers-logins = ["Blady-Com"]
+
+[[external]]
+kind = "system"
+origin = ["m4"]
+
+[[external]]
+kind = "version-output"
+version-command = [ "m4", "--version" ]
+version-regexp = "m4.*M4. ([\\d\\.]+)"

index/nc/ncursesada/ncursesada-6.3.0.toml

@@ -0,0 +1,37 @@
+name = "ncursesada"
+description = "Ada binding to the ncurses text user interface library"
+version = "6.3.0"
+tags = ["ncurses", "binding"]
+
+authors = ["Thomas E. Dickey", "Juergen Pfeifer", "Eric S Raymond", "Alexander V Lukyanov",
+           "Philippe Blain", "Sven Verdoolaege", "Nicolas Boulenguez"]
+
+maintainers = ["Pascal Pignard <blady.net@orange.fr>"]
+maintainers-logins = ["Blady-Com"]
+website = "https://github.com/Blady-Com/ncurses"
+
+licenses = "X11 OR MIT"
+
+project-files = ["Ada95/lib_adacurses.gpr"]
+
+[available.'case(os)']
+linux   = true
+macos   = true
+windows = false
+'...'   = false
+
+[[depends-on]]
+m4_tool = "*"
+
+[[actions]]
+type = "post-fetch"
+command = ["sh", "configure"]
+
+[[actions]]
+type = "post-fetch"
+command = ["make", "libs"]
+
+[origin]
+commit = "c6c68b5b2a7ac94d7fa980d2fc3e7d78c50b55e3"
+url = "git+https://github.com/Blady-Com/ncurses.git"
+