From ea844727f7ebbea228915d6f35da40d3e5fea0f6 Mon Sep 17 00:00:00 2001
From: snow <snow@datagirl.xyz>
Date: Fri, 1 May 2020 20:19:55 -0700
Subject: [PATCH] Add support for --enable-envsys when running ./configure

---
 wmbattery/Makefile.in  | 9 +++++++++
 wmbattery/configure.ac | 7 +++++++
 2 files changed, 16 insertions(+)

diff --git a/wmbattery/Makefile.in b/wmbattery/Makefile.in
index 5b9a3a3..12a538c 100644
--- a/wmbattery/Makefile.in
+++ b/wmbattery/Makefile.in
@@ -21,6 +21,7 @@ LDFLAGS		= @LDFLAGS@
 LIBS		= @LIBS@ @Xlib_LIBS@ @Xext_LIBS@ @libXpm_LIBS@
 USE_HAL         = @USE_HAL@
 USE_UPOWER      = @USE_UPOWER@
+USE_ENVSYS      = @USE_ENVSYS@
 
 all: wmbattery
 
@@ -80,6 +81,14 @@ upower.o: upower.c
 	$(CC) $(CPPFLAGS) $(CFLAGS) -c upower.c -o upower.o
 endif
 
+ifdef USE_ENVSYS
+CPPFLAGS += -DENVSYS
+LIBS += -lprop
+OBJS += envsys.o
+envsys.o: envsys.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) -c envsys.c -o envsys.o
+endif
+
 wmbattery: $(OBJS)
 	$(CC) -o wmbattery $(LDFLAGS) $(OBJS) $(LIBS)
 
diff --git a/wmbattery/configure.ac b/wmbattery/configure.ac
index 2796d2a..2413c83 100644
--- a/wmbattery/configure.ac
+++ b/wmbattery/configure.ac
@@ -39,6 +39,13 @@ AS_IF([test x$enable_upower != xno], [
   PKG_CHECK_MODULES([upower], [upower-glib])
   AC_SUBST(USE_UPOWER, 1)
 ])
+AC_ARG_ENABLE(envsys, AS_HELP_STRING([--enable-envsys], [enable envsys]),
+              [], [enable_envsys=no])
+AS_IF([test x$enable_envsys != xno], [
+  AC_CHECK_HEADERS(sys/envsys.h)
+  AC_CHECK_HEADERS(prop/proplib.h)
+  AC_SUBST(USE_ENVSYS, 1)
+])
 
 dnl Checks for header files.
 AC_HEADER_STDC