4 files changed, 161 insertions, 1 deletions
diff --git a/gnu/packages/jami.scm b/gnu/packages/jami.scm
index 85a06026ed..6dbde4078b 100644
--- a/gnu/packages/jami.scm
+++ b/gnu/packages/jami.scm
@@ -171,7 +171,8 @@
                   "0007-pj_ice_sess"
                   "0008-fix_ioqueue_ipv6_sendto"
                   "0009-add-config-site"
-                  "0010-fix-pkgconfig"
+                  ;; Note: The base pjproject is already patched with
+                  ;; "0010-fix-pkgconfig".
                   "0011-fix-tcp-death-detection"
                   "0012-fix-turn-shutdown-crash"))
                #t)))
diff --git a/gnu/packages/patches/pjproject-correct-the-cflags-field.patch b/gnu/packages/patches/pjproject-correct-the-cflags-field.patch
new file mode 100644
index 0000000000..8bc503580d
--- /dev/null
+++ b/gnu/packages/patches/pjproject-correct-the-cflags-field.patch
@@ -0,0 +1,121 @@
+From 44f8f6c1c71bec6bf00269b075a2dc801ae6fd45 Mon Sep 17 00:00:00 2001
+From: Vladimir Stoiakin <VStoiakin@lavabit.com>
+Date: Thu, 23 Apr 2020 14:06:40 +0300
+Subject: [PATCH 1/2] libpjproject.pc: correct the field 'cflags'
+
+---
+ Makefile           | 6 ++----
+ aconfigure         | 4 ++++
+ aconfigure.ac      | 3 +++
+ build.mak.in       | 7 +++----
+ libpjproject.pc.in | 4 ++--
+ 5 files changed, 14 insertions(+), 10 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index ffaf638dd..3fd5cab40 100644
+--- a/Makefile
++++ b/Makefile
+@@ -132,10 +132,8 @@ install:
+ 		sed -e "s!@INCLUDEDIR@!$(includedir)!" | \
+ 		sed -e "s!@LIBDIR@!$(libdir)!" | \
+ 		sed -e "s/@PJ_VERSION@/$(PJ_VERSION)/" | \
+-		sed -e "s!@PJ_LDLIBS@!!" | \
+-		sed -e "s!@PJ_LDXXLIBS@!$(PJ_LDXXLIBS)!" | \
+-		sed -e "s!@PJ_INSTALL_CFLAGS@!!" | \
+-		sed -e "s!@PJ_INSTALL_CXXFLAGS@!$(PJ_INSTALL_CXXFLAGS)!" > $(DESTDIR)/$(libdir)/pkgconfig/libpjproject.pc
++		sed -e "s!@PJ_INSTALL_LDFLAGS@!$(PJ_INSTALL_LDFLAGS)!" | \
++		sed -e "s!@PJ_INSTALL_CFLAGS@!$(PJ_INSTALL_CFLAGS)!" > $(DESTDIR)/$(libdir)/pkgconfig/libpjproject.pc
+ 
+ uninstall:
+ 	$(RM) $(DESTDIR)$(libdir)/pkgconfig/libpjproject.pc
+diff --git a/aconfigure b/aconfigure
+index 2abbcf533..1ab932bda 100755
+--- a/aconfigure
++++ b/aconfigure
+@@ -706,6 +706,7 @@ GREP
+ CPP
+ ac_cross_compile
+ ac_shlib_suffix
++ac_cflags
+ ac_build_mak_vars
+ ac_pjdir
+ CC_CFLAGS
+@@ -3952,6 +3953,7 @@ if test "$CC_CFLAGS" = ""; then CC_CFLAGS="-Wall"; fi
+ 
+ 
+ 
++
+ case $host in
+     *mingw* | *cygw* | *win32* | *w32* )
+ 	if pwd -W 2&> /dev/null; then
+@@ -5138,8 +5140,10 @@ $as_echo "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
+ 
+ if test "x$ac_cv_c_bigendian" = "xyes"; then
+   CFLAGS="$CFLAGS -DPJ_IS_BIG_ENDIAN=1 -DPJ_IS_LITTLE_ENDIAN=0"
++  ac_cflags="$ac_cflags -DPJ_IS_BIG_ENDIAN=1 -DPJ_IS_LITTLE_ENDIAN=0"
+ else
+   CFLAGS="$CFLAGS -DPJ_IS_BIG_ENDIAN=0 -DPJ_IS_LITTLE_ENDIAN=1"
++  ac_cflags="$ac_cflags -DPJ_IS_BIG_ENDIAN=0 -DPJ_IS_LITTLE_ENDIAN=1"
+ fi
+ 
+ 
+diff --git a/aconfigure.ac b/aconfigure.ac
+index 83d3559ed..b1d493c08 100644
+--- a/aconfigure.ac
++++ b/aconfigure.ac
+@@ -71,6 +71,7 @@ AC_SUBST(CC_CFLAGS)
+ 
+ AC_SUBST(ac_pjdir)
+ AC_SUBST(ac_build_mak_vars)
++AC_SUBST(ac_cflags)
+ 
+ case $host in 
+     *mingw* | *cygw* | *win32* | *w32* )
+@@ -144,8 +145,10 @@ AC_C_BIGENDIAN
+ 
+ if test "x$ac_cv_c_bigendian" = "xyes"; then
+   CFLAGS="$CFLAGS -DPJ_IS_BIG_ENDIAN=1 -DPJ_IS_LITTLE_ENDIAN=0"
++  ac_cflags="$ac_cflags -DPJ_IS_BIG_ENDIAN=1 -DPJ_IS_LITTLE_ENDIAN=0"
+ else
+   CFLAGS="$CFLAGS -DPJ_IS_BIG_ENDIAN=0 -DPJ_IS_LITTLE_ENDIAN=1"
++  ac_cflags="$ac_cflags -DPJ_IS_BIG_ENDIAN=0 -DPJ_IS_LITTLE_ENDIAN=1"
+ fi
+ 
+ dnl
+diff --git a/build.mak.in b/build.mak.in
+index abc0c4fa0..a9078bb25 100644
+--- a/build.mak.in
++++ b/build.mak.in
+@@ -299,7 +299,7 @@ export APP_LDXXLIBS := $(PJSUA2_LIB_LDLIB) \
+ 	-lstdc++ \
+ 	$(APP_LDLIBS)
+ 
+-# Here are the variabels to use if application is using the library
++# Here are the variables to use if application is using the library
+ # from within the source distribution
+ export PJ_CC := $(APP_CC)
+ export PJ_CXX := $(APP_CXX)
+@@ -317,6 +317,5 @@ export PJ_LIBXX_FILES := $(APP_LIBXX_FILES)
+ export PJ_INSTALL_DIR := @prefix@
+ export PJ_INSTALL_INC_DIR := @includedir@
+ export PJ_INSTALL_LIB_DIR := @libdir@
+-export PJ_INSTALL_CFLAGS := -I$(PJ_INSTALL_INC_DIR) -DPJ_AUTOCONF=1 @CFLAGS@
+-export PJ_INSTALL_CXXFLAGS := @CXXFLAGS@ $(PJ_INSTALL_CFLAGS)
+-export PJ_INSTALL_LDFLAGS := -L$(PJ_INSTALL_LIB_DIR) $(APP_LDLIBS)
++export PJ_INSTALL_CFLAGS := -I$(PJ_INSTALL_INC_DIR) -DPJ_AUTOCONF=1 @ac_cflags@
++export PJ_INSTALL_LDFLAGS := -L$(PJ_INSTALL_LIB_DIR) $(APP_LDXXLIBS)
+diff --git a/libpjproject.pc.in b/libpjproject.pc.in
+index fa8d39114..30ea05c07 100644
+--- a/libpjproject.pc.in
++++ b/libpjproject.pc.in
+@@ -9,5 +9,5 @@ Name: libpjproject
+ Description: Multimedia communication library
+ URL: http://www.pjsip.org
+ Version: @PJ_VERSION@
+-Libs: -L${libdir} @PJ_LDXXLIBS@
+-Cflags: -I${includedir} @PJ_INSTALL_CXXFLAGS@
++Libs: @PJ_INSTALL_LDFLAGS@
++Cflags: @PJ_INSTALL_CFLAGS@
+-- 
+2.27.0
+
diff --git a/gnu/packages/patches/pjproject-fix-pkg-config-ldflags.patch b/gnu/packages/patches/pjproject-fix-pkg-config-ldflags.patch
new file mode 100644
index 0000000000..a3f2852515
--- /dev/null
+++ b/gnu/packages/patches/pjproject-fix-pkg-config-ldflags.patch
@@ -0,0 +1,34 @@
+From 7a86f357ffa2339a67991e5f4f5610a218e80693 Mon Sep 17 00:00:00 2001
+From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
+Date: Mon, 3 Aug 2020 17:43:19 -0400
+Subject: [PATCH 2/2] build.mak.in: Filter out 3rd party libraries from
+ PJ_INSTALL_LDFLAGS.
+
+This is done so users of the installed pjproject libraries do not get
+directives (provided via pkg-config file of pjproject) to link against
+pjproject's own library dependencies.
+
+* build.mak.in (THIRD_PARTY_LIBRARIES): New variable.
+(PJ_INSTALL_LDFLAGS): Filter out THIRD_PARTY_LIBRARIES.
+---
+ build.mak.in | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/build.mak.in b/build.mak.in
+index a9078bb25..86fd1ec30 100644
+--- a/build.mak.in
++++ b/build.mak.in
+@@ -314,8 +314,9 @@ export PJ_LIBXX_FILES := $(APP_LIBXX_FILES)
+ 
+ # And here are the variables to use if application is using the
+ # library from the install location (i.e. --prefix)
++THIRD_PARTY_LIBRARIES := $(APP_THIRD_PARTY_LIBS) $(APP_THIRD_PARTY_EXT) @LIBS@
+ export PJ_INSTALL_DIR := @prefix@
+ export PJ_INSTALL_INC_DIR := @includedir@
+ export PJ_INSTALL_LIB_DIR := @libdir@
+ export PJ_INSTALL_CFLAGS := -I$(PJ_INSTALL_INC_DIR) -DPJ_AUTOCONF=1 @ac_cflags@
+-export PJ_INSTALL_LDFLAGS := -L$(PJ_INSTALL_LIB_DIR) $(APP_LDXXLIBS)
++export PJ_INSTALL_LDFLAGS := -L$(PJ_INSTALL_LIB_DIR) $(filter-out $(THIRD_PARTY_LIBRARIES),$(APP_LDXXLIBS))
+-- 
+2.27.0
+
diff --git a/gnu/packages/telephony.scm b/gnu/packages/telephony.scm
index f5b484dc2b..cc31cd6a36 100644
--- a/gnu/packages/telephony.scm
+++ b/gnu/packages/telephony.scm
@@ -731,6 +731,10 @@ your calls and messages.")
         (base32
          "1aklicpgwc88578k03i5d5cm5h8mfm7hmx8vfprchbmaa2p8f4z0"))
        (modules '((guix build utils)))
+       ;; The patches upstream status can be tracked at:
+       ;; https://github.com/pjsip/pjproject/pull/2501.
+       (patches (search-patches "pjproject-correct-the-cflags-field.patch"
+                                "pjproject-fix-pkg-config-ldflags.patch"))
        (snippet
         '(begin
            ;; Remove bundled libraries.