[PATCH 1/3] build: add config for libc gnu and musl

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Signed-off-by: Jason Zaman <jason@xxxxxxxxxxxxx>
---
 Makefile               | 7 +++++++
 build.conf             | 5 +++++
 support/Makefile.devel | 4 ++++
 3 files changed, 16 insertions(+)

diff --git a/Makefile b/Makefile
index 57d297c9..8e149345 100644
--- a/Makefile
+++ b/Makefile
@@ -192,6 +192,10 @@ ifeq "$(DISTRO)" "ubuntu"
 	M4PARAM += -D distro_debian
 endif
 
+ifneq ($(LIBC),)
+	M4PARAM += -D libc_$(LIBC)
+endif
+
 ifeq "$(SYSTEMD)" "y"
 	M4PARAM += -D init_systemd
 endif
@@ -541,6 +545,9 @@ install-headers: $(layerxml) $(tunxml) $(boolxml)
 	$(verbose) echo "NAME ?= $(NAME)" >> $(headerdir)/build.conf
 ifneq "$(DISTRO)" ""
 	$(verbose) echo "DISTRO ?= $(DISTRO)" >> $(headerdir)/build.conf
+endif
+ifneq "$(LIBC)" ""
+	$(verbose) echo "LIBC ?= $(LIBC)" >> $(headerdir)/build.conf
 endif
 	$(verbose) echo "MONOLITHIC ?= n" >> $(headerdir)/build.conf
 	$(verbose) echo "DIRECT_INITRC ?= $(DIRECT_INITRC)" >> $(headerdir)/build.conf
diff --git a/build.conf b/build.conf
index a2f1a9b5..add0fcf8 100644
--- a/build.conf
+++ b/build.conf
@@ -29,6 +29,11 @@ NAME = refpolicy
 # Fedora users should enable redhat.
 #DISTRO = redhat
 
+# libc
+# Setting this will configure which libc is used.
+# gnu, musl are the current options.
+LIBC = gnu
+
 # Unknown Permissions Handling
 # The behavior for handling permissions defined in the
 # kernel but missing from the policy.  The permissions
diff --git a/support/Makefile.devel b/support/Makefile.devel
index f3daca11..fb296084 100644
--- a/support/Makefile.devel
+++ b/support/Makefile.devel
@@ -58,6 +58,10 @@ ifneq ($(DISTRO),)
 	M4PARAM += -D distro_$(DISTRO)
 endif
 
+ifneq ($(LIBC),)
+	M4PARAM += -D libc_$(LIBC)
+endif
+
 ifeq "$(SYSTEMD)" "y"
 	M4PARAM += -D init_systemd
 endif
-- 
2.18.1




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