Timur Davydov has uploaded this change for review.

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configure: handle emscripten builds and disable unsupported features

Detect emscripten compiler and adjust default configure options
accordingly. When building with emcc, disable ortp and DAHDI
support by default, as these components are not applicable in
Emscripten environments.

Also ignore generated .wasm artifacts in .gitignore.

No functional change for native builds.

Change-Id: I879e698f2d514cf6e2f7bb33b4d6148f79aea6f6
---
M .gitignore
M configure.ac
2 files changed, 24 insertions(+), 2 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/libosmo-abis refs/changes/56/41956/1

diff --git a/.gitignore b/.gitignore
index 30a1cf7..a50ee62 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@
 *.lo
 *.la
 *.pc
+*.wasm
 aclocal.m4
 m4/*.m4
 autom4te.cache
diff --git a/configure.ac b/configure.ac
index e38201f..b5f9526 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,6 +23,18 @@
 AC_PROG_INSTALL
 LT_INIT([pic-only])
 
+dnl Detect emscripten compiler
+case "$CC" in
+*emcc*)
+	emscripten=yes
+	;;
+*)
+	emscripten=no
+	;;
+esac
+AM_CONDITIONAL(HAVE_EMSCRIPTEN, test "x$emscripten" = "xyes")
+AC_SUBST([HAVE_EMSCRIPTEN], [$emscripten])
+
 dnl patching ${archive_cmds} to affect generation of file "libtool" to fix linking with clang
 AS_CASE(["$LD"],[*clang*],
   [AS_CASE(["${host_os}"],
@@ -73,12 +85,21 @@
 
 PKG_CHECK_MODULES(LIBOSMONETIF, libosmo-netif >= 1.7.0)
 
+ENABLE_ORTP_DEFAULT="yes"
+ENABLE_DAHDI_DEFAULT="yes"
+
+if test "x$emscripten" = "xyes"
+then
+	ENABLE_ORTP_DEFAULT="no"
+	ENABLE_DAHDI_DEFAULT="no"
+fi
+
 AC_ARG_ENABLE([ortp], [AS_HELP_STRING([--disable-ortp], [Build without ortp support])],
     [
         ENABLE_ORTP=$enableval
     ],
     [
-        ENABLE_ORTP="yes"
+        ENABLE_ORTP=$ENABLE_ORTP_DEFAULT
     ])
 AS_IF([test "x$ENABLE_ORTP" = "xyes"], [
 	PKG_CHECK_MODULES(ORTP, ortp >= 0.22.0)
@@ -90,7 +111,7 @@
 AC_ARG_ENABLE([dahdi],
 	      AC_HELP_STRING([--disable-dahdi],
 			     [disable support for DAHID ISDN (E1/T1) cards [default=yes]]),
-	      [enable_dahdi="$enableval"], [enable_dahdi="yes"])
+	      [enable_dahdi="$enableval"], [enable_dahdi=$ENABLE_DAHDI_DEFAULT])
 AM_CONDITIONAL(ENABLE_DAHDI, test "x$enable_dahdi" = "xyes")
 if test "x$enable_dahdi" =  "xyes"; then
 	AC_CHECK_HEADERS([dahdi/user.h],[],[AC_MSG_ERROR([DAHDI input driver enabled but DAHDI not found])])

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